The Effects of Cognitive and Noncognitive Abilities on Labor Market Outcomes and Social Behavior

Heckman, Stixrud, Urzua · Journal of Labor Economics · 2006 · economics · 10.1086/504455 · record Heckman2006-the-effects-of-cognitive-and-noncognitive-ab
tag layer · index · concepts · authors · עברית
Where this record's text came from. faceted 2026-08 by reading the locally held text (pdftext); every evidence string verified as an exact substring of that text before merging. Claim type is 'existence' because the headline claim is that a low-dimensional skill vector accounts for a wide array of outcomes; the paper also carries a strong methodological contribution (an alternative to IV using latent factors with endogenous loadings) and an explicit critique of 'g' theory, both recorded in claim_relations. method has no match in the suggested vocabulary — this is structural econometric modelling of longitudinal survey data (NLSY79) with Bayesian MCMC estimation, so a descriptive label is used. Replication status left 'untested' for the paper's own claim: the only corroboration reported is internal (a CNLSY79 re-analysis by the same authors, described as 'broadly consistent' but 'much less precisely estimated'), which is not independent replication. 2026-08-13, 2026-08-14 and 2026-08-15 schema-0.3 passes: every quote verified as an exact substring of the staged text and anchored at merge time; concept terms verified present; every edge endpoint an existing node.
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Some words in these quotes contain the wrong character. The PDF this text was extracted from substituted 2 characters inside a word — a currency sign or a stray accent where a letter pair belongs, as in signi¢cantly for significantly, or a single ligature glyph, as in confidence. They are valid characters in the wrong place, so they survive every encoding check. The quotes keep them for the same reason as above, and a search of this page will not find the affected words.
How to read this page. The article itself is not reproduced here — this paper is not cleared for redistribution, so what follows is the tag layer alone. The evidence sentences are withheld with the article. The table at the foot lists every tag the record carries; each row names the facet it belongs to, and the whose words column says whether the tag records the paper's own wording or the tagger's sentence about the paper. Every tag links to each other paper in the corpus carrying it. The machine-readable edition of the same thing is the TEI file beside this one, where the tags live in standOff, and the article is at its publisher via the link below. When we have changed our mind. Some entries in the table begin with a word in capitals and the reason for it. EVIDENCE CORRECTED — the finding still stands, but we had quoted the wrong sentence from the paper, and the quotation has been replaced with the right one. RETRACTED — the entry itself was wrong; it stays on the page, marked, with the reason, rather than being deleted. WITHDRAWN AND REPLACED — the entry was wrong, and a corrected version of it appears in the entries below. Each mark carries its own reason, in brackets, because the reasons differ from one entry to the next. An entry we have WITHDRAWN is removed from this page and kept in the record, with its reason. A line reading Audit and a date is a later re-reading of the entry against its whole sentence: DOUBTFUL means it was kept, and the reason says what is loose about it. Quotation marks inside the tagger's sentence. Where a tag is the tagger's own sentence, a phrase in quotation marks inside it is borrowed from the paper — the tagger's wording around it is not. The paper's own sentence is the evidence quote for that row; on this page it is withheld with the article, and the article is at its publisher. Nothing inside quotation marks anywhere on this page is ours: if it is quoted, it is the paper's. Whose words a concept carries. A concept entry records a term the paper itself uses, so the term, the sense given for it, and its evidence are the paper's own words, quoted where the paper fixes them. This is the opposite of a sense entry in the tag table, which is the tagger's sentence about how the paper uses a term. Where a concept entry could not be grounded in the paper's words, the entry says so on its own row.
Other fields define these differently the same word, defined another way in another discipline
gender 2 fields · factor analysis 2 fields · measurement error 2 fields

Tags on this paper

Every tag the record carries, each linking to every other paper in the corpus that carries it. A tag appears here whether or not its words occur in the article — the spans below are only the ones a sentence in this paper licenses. Of the 9 concept tags on this paper, all 9 are grounded in a quoted sentence.
noncognitive skills cognitive skills normalizations measurement error ASVAB Rotter Locus of Control Scale coding speed AFQT schooling A single low-dimensional pair of latent abilities acts as the common cause generating the observed clustering of risky adolescent behaviors together with schooling and wage outcomes. Noncognitive skills raise wages along two routes: directly by raising productivity, and indirectly by raising schooling attainment and accumulated work experience. The GED wage penalty arises because GED holders' deficit in noncognitive skill lowers employment and work-experience accumulation and removes a trait the market pays for. GED illegal activities Rotter Internal-External Locus of Control Scale risky behaviors schooling level at the time of the test gender ethnicity dummies cohort dummies local labor market conditions region of residence dummies work experience choice of occupation employment ordinary least squares regression a standard least squares analysis probit / multinomial discrete choice models probit analysis and multinomial choice models Bayesian Markov chain Monte Carlo estimation Bayesian MCMC methods chi-squared test goodness-of-fit test Overall goodness of fit tests are passed factor analysis correlation The cross-correlations weaken standard error Standard errors in parentheses observational-study
Method, as described: latent-factor-econometric-modelling

Legend

relation to other workclaim_relationshow this paper stands to another: agrees, contradicts, extends, qualifies
claim typeclaim_typethe shape of the claim: existence, mechanism, method, critique, prediction, null
concept edgeconcept_edgesan asserted relation between two concepts, with the sentence asserting it
conceptconceptsan idea the paper works with, quoted where the paper uses it
content tagcontent_tagsa finding, definition, quantity, statistic or variable named in the paper
controlcontrolsan experiment run to eliminate a rival explanation
limitationlimitationswhat the paper says its evidence cannot support
mechanismmechanismshow the reported effect is said to come about
methodmethodhow the paper produced its evidence
phenomenonphenomenonthe effect or regularity under study
sensesensesa distinct use of a term, quoted where the paper fixes it
transfertransfersa method or concept carried in from another field
unrecordable relationunhoused_relationsa relation the paper asserts that this vocabulary cannot express, with the reason

The paper

The full text is not reproduced here. This article is not cleared for redistribution, so the page carries the tag layer only. Its evidence sentences are withheld; the grounding status remains with each tag, and the article itself is at https://doi.org/10.1086/504455. The reading view exists for the papers whose licence permits it.

Every tag on this page

claim_relations 6 · claim_type 1 · concept_edges 4 · concepts 9 · content_tags 40 · controls 1 · limitations 13 · mechanisms 3 · method 1 · phenomenon 1 · senses 6 · transfers 3 · unhoused_relations 1

Relations on this page carry a quotation for the claim. Where a relation was separately evidenced — and so tested against the vocabulary for its type — the row says so; none of 4 relations here carry that mark. The rest are the tagger’s reading of the sentence quoted beside them.

facettagfieldconf.whose words
claim_typeexistence
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claim_typethe paper's words
phenomenoncognitive and noncognitive skills as determinants of labour-market and behavioural outcomes
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phenomenonthe paper's words
methodobservational-study
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methodthe paper's words
mechanismsmechanisms
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mechanisms[0]the tagger's words
mechanismsmechanisms
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mechanisms[1]the tagger's words
mechanismsmechanisms
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mechanisms[2]the tagger's words
limitationsThe paper does not estimate the separate channels (preferences, discount rate, human-capital productivity, market productivity) through which the abilities operate.
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what this limits: any mechanistic reading of the results: WE DO NOT ESTIMATE RELATIONSHIPS FOR EACH OF THE CHANNELS THROUGH WHICH COGNITIVE AND NONCOGNITIVE ABILITIES MIGHT OPERATE
limitations[0]the tagger's words
limitationsCollapsing noncognitive skill into a single latent factor is unlikely to capture all its aspects.
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what this limits: every claim stated in terms of noncognitive skill: THERE ARE MANY ASPECTS ... SELF CONTROL, TIME PREFERENCE, SOCIABILITY ... IT IS LESS LIKELY THAT ONE TRAIT CAPTURES ALL ASPECTS - the construct is collapsed to one latent factor
limitations[1]the tagger's words
limitationsSupport conditions for semiparametric identification are not met, so results rest on the parametric structure of the model.
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what this limits: every estimate in the paper: THE EMPIRICAL RESULTS THAT WE GENERATE ARE IDENTIFIED FROM THE PARAMETRIC STRUCTURE OF THE MODEL - the support conditions for semiparametric identification are not met, so the answers come from the assumed form
limitations[2]the tagger's words
limitationsThe underlying theoretical model is static and ignores the timing of decisions.
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what this limits: any conclusion about sequencing or timing: OUR THEORETICAL MODEL IS STATIC AND DOES NOT CONSIDER THE TIMING OF DECISIONS
limitations[3]the tagger's words
limitationsThe corroborating CNLSY79 data lack adult outcomes and have small samples.
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what this limits: the CNLSY79 corroboration only: MANY OF THE CHILDREN ARE STILL YOUNG AND WE LACK INFORMATION ON THEIR WAGES, OCCUPATIONAL STATUS AND EMPLOYMENT AT AGE 30
limitations[4]the tagger's words
limitationsThe noncognitive measures used (Rotter, Rosenberg) are narrower than would be ideal and are not linked to economic preference parameters.
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what this limits: the interpretation of the noncognitive measures: IT WOULD BE BETTER TO USE A WIDER ARRAY OF PSYCHOLOGICAL MEASUREMENTS AND ... TO CONNECT THEM WITH MORE CONVENTIONAL MEASURES OF PREFERENCE PARAMETERS IN ECONOMICS
limitations[5]the tagger's words
limitationsThe scale of the two latent abilities is not measured but set: two normalizations are stated to be required for identification, and they fix the scale of the factors.
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what this limits: the magnitude of a factor score as a quantity of ability: the paper states two normalizations are required for identification and that they set the scale of the factors
limitations[6]1.0the tagger's words
limitationsThe direction of the bias in the conventional estimates is stated to be unknown, because the problems push in different directions.
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what this limits: treating an OLS estimate as a bound on the effect: the paper states the biases run in different directions so the sign of the difference from its own model cannot be predicted
limitations[7]1.0the tagger's words
limitationsThe measures used are declared imperfect: the attitude scales proxying noncognitive ability are affected by family background and are called at best imperfect measures of true ability.
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what this limits: any test score read as the ability itself: the paper states these scores are affected by family background and are at best imperfect measures of an individual's true abilities
limitations[8]1.0the tagger's words
limitationsWhat the construct covers is bounded by the instrument available in the survey, and the authors say a wider array of psychological measurement would have been better.
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what this limits: the noncognitive factor as the full space of noncognitive ability: the authors state a wider array of psychological measurements would ideally have been used
limitations[9]1.0the tagger's words
limitationsThe channels through which the abilities act are not separately estimated; the model is a linear-in-the-parameters approximation.
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what this limits: attributing an effect to a particular channel: the paper states it does not estimate the relationships for each channel separately and that its model approximates the general one
limitations[10]1.0the tagger's words
limitationsAn interchangeability the paper asserts in principle is explicitly deferred rather than shown.
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what this limits: the claim that test scores and behaviours are interchangeable proxies: the paper states this in principle and leaves the task for future work
limitations[11]1.0the tagger's words
limitationsThe disputed word in this literature is 'importance', and the paper's claim holds under one sense of it and reverses under another that the paper states in the same sentence: cognitive skills explain much more of the variance of log wages, while the skill gradients of the two abilities are similar. The paper marks its choice ('for the sense of importance adopted in this paper') rather than leaving it implied, which is what makes the reversal checkable at all.
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limitations[12]0.9the tagger's words
transfersThe authors take the latent-variable measurement models built in psychometrics and extend them so that a choice variable (schooling) and background variables can enter the measurement equations of an economic model.
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transfers[0]the tagger's words
transferstwo psychology instruments - the Rotter Locus of Control Scale and the Rosenberg Self-Esteem Scale - are imported into labour economics to stand for noncognitive skill
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transfers[1]0.95the tagger's words
transferscognitive skill is measured with five subtests of the Armed Services Vocational Aptitude Battery, an instrument built for military selection and re-used as an economic variable
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transfers[2]0.95the tagger's words
controlsholding cognitive ability constant when comparing GED recipients with high school dropouts
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eliminates: cognitive ability as the explanation of any wage difference attributed to the credential - and with it removed, the difference reverses rather than shrinking · outcome (stated by the tagger, no quotation): held
controls[0]0.85the tagger's words
conceptsnoncognitive skills
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concepts[0]the paper's words
conceptscognitive skills
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concepts[1]the paper's words
conceptsnormalizations
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concepts[2]the paper's words
conceptsmeasurement error
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concepts[3]the paper's words
conceptsASVAB
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also in: ASVAB
concepts[4]0.95the paper's words
conceptsRotter Locus of Control Scale
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concepts[5]0.95the paper's words
conceptscoding speed
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about this quote: DAMAGED GLYPHS IN THIS QUOTE: (cid:48). These are raw PDF font glyph indices that leaked out in place of the characters they stand for - usually a mathematical operator. The quote is verbatim to the staged text and its anchor is sound; the STAGED TEXT is what is damaged. NOT repaired: the cid-to-character mapping is defined by the font embedded in that particular PDF, so guessing it would produce a clean and unverifiable quote. Repair needs the source PDF and is a re-staging job.
also in: coding speed
concepts[6]0.9the paper's words
conceptsAFQT
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also in: AFQT
concepts[7]0.95the paper's words
conceptsschooling
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also in: schooling
concepts[8]0.95the paper's words
unhoused_relationsability → schooling
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THE TWO CANNOT BE SEPARATED IN THIS STUDY - the DESIGN form / It bounds what the paper's own results can mean, and it lives in a methods paragraph where nothing downstream will find it. The confound is between the paper's own explanatory variables, so it bounds every coefficient in the table it is attached to.
unhoused_relations[0]the tagger's words
sensesnoncognitive skills - AS MEASURED: scores on attitude scales, which the paper calls at best imperfect measures of the individual's true ability
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senses[0]1.0the tagger's words
sensesnoncognitive skills - AS MODELLED: a latent factor whose scale is fixed by normalization rather than by measurement
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senses[1]1.0the tagger's words
sensesBayesian methods - used here for computation only, with the identification argument stated to be strictly classical and the priors asymptotically irrelevant
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senses[2]1.0the tagger's words
sensestest score - a quantity that depends on schooling completed AT THE TIME OF THE TEST, so the measurement is not independent of the outcome being explained
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senses[3]1.0the tagger's words
sensesimportance - IN THE SENSE THIS PAPER ADOPTS: the size of the skill gradient, how much an outcome moves when a person is moved across the distribution of one ability. ON THE RIVAL MEASURE THE RANKING REVERSES AND THE PAPER SAYS SO IN THE SAME SENTENCE: cognitive skills 'explain much more of the variance of (log) wages', while by skill gradients the two are similar
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about this quote: PAGE FURNITURE IS SPLICED INTO THE 'evidence' QUOTE - the text of footnote 33 and a page number, between 'their effects on (log)' and 'wages (as measured'. The words on either side of it were never continuous on the page; read the quote with it deleted.
senses[4]0.95the tagger's words
sensesimportance - A THIRD SENSE THE PAPER NAMES AND EXPLICITLY DOES NOT CLAIM: equal strength in its own sense 'does not translate into equal cost of changing these skills', so the finding is silent on which ability is cheaper to change
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senses[5]0.95the tagger's words
claim_relationscontradicts → the "g" theory of Herrnstein and Murray (1994) and Jensen (1998)
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claim_relations[0]the tagger's words
claim_relationsbuilds-on → Hansen, Heckman, and Mullen (2004)
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claim_relations[1]the tagger's words
claim_relationsextends → the LISREL model of Jöreskog (1977) and the MIMIC model of Jöreskog and Goldberger (1975)
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claim_relations[2]the tagger's words
claim_relationsreplicates → Neal and Johnson (1996); Hansen, Heckman, and Mullen (2004); Heckman, Larenas, and Urzua (2004)
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claim_relations[3]the tagger's words
claim_relationscontradicts → Herrnstein and Murray (1994) and Herrnstein and Wilson (1985) on cognitive ability and crime
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claim_relations[4]the tagger's words
claim_relationscontradicts → the single-skill signalling model of Arrow (1973) and Spence (1973)
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claim_relations[5]the tagger's words
concept_edgescognitive skills —operationalised-as→ ASVAB
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strength of the relation: 0.9 · note: Five subtests of a battery built to decide military eligibility - the paper says elsewhere that the AFQT composite 'is a general measure of trainability and a primary…'. An instrument designed for a selection decision is here the measure of the construct.
concept_edges[0]0.95the tagger's words
concept_edgesnoncognitive skills —operationalised-as→ Rotter Locus of Control Scale
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strength of the relation: 0.85 · note: THE PAPER STATES ITS REASON FOR CHOOSING THEM AND IT IS NOT FITNESS: '…these measures because of their availability in the NLSY…' The construct carrying the paper's headline claim against Herrnstein and Murray is measured by a four-item abbreviated locus-of-control scale and a self-esteem scale, picked for what the survey happened to contain. Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but the span writes 'noncognitive measures', not 'noncognitive skills'.
concept_edges[1]0.95the tagger's words
concept_edgescognitive skills —operationalised-as→ coding speed
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strength of the relation: 0.8 · note: THE UNIT OF THE LATENT ABILITY IS SET BY WHICHEVER INDICATOR WAS GIVEN THE 1. The cognitive factor's loading is normalised to 1 on CODING SPEED (ASVAB 5) and the noncognitive factor's on the Rosenberg Self-Esteem Scale, both 'for individuals in grades 9 to 11 at the time of the test' - so the scale is fixed by an indicator choice AND a schooling subgroup. The record already carries the existence of the normalisation; this names what the units are. NOTE THE HEADLINE COMPARISON DOES NOT DEPEND ON IT: the paper compares the two abilities by moving people between DECILES of each factor's own distribution, which is invariant to the scale.
concept_edges[2]0.85the tagger's words
concept_edgesschooling —causes→ AFQT
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strength of the relation: 0.9 · note: THE PROXY IS CAUSED BY THE OUTCOME IT IS USED TO EXPLAIN: each additional year of schooling raises measured AFQT by 2 to 4 percentage points on average, and '…THIS CREATES A REVERSE CAUSALITY…' problem. The paper says flatly in its conclusion that schooling '…raises measured cognitive…' and noncognitive ability. Naming this is the reason the paper builds a latent-factor model instead of regressing on test scores.
also in: schooling · AFQT
concept_edges[3]0.95the tagger's words
content_tagsordinary least squares regression
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content_tags.statistics[0]the tagger's words
content_tagsprobit / multinomial discrete choice models
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content_tags.statistics[1]the tagger's words
content_tagsBayesian Markov chain Monte Carlo estimation
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content_tags.statistics[2]the tagger's words
content_tagschi-squared test
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content_tags.statistics[3]the tagger's words
content_tagsgoodness-of-fit test
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content_tags.statistics[4]the tagger's words
content_tagsfactor analysis
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content_tags.statistics[5]the tagger's words
content_tagscorrelation
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also in: correlation
content_tags.statistics[6]the tagger's words
content_tagsstandard error
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content_tags.statistics[7]the tagger's words
content_tagsA low-dimensional vector of cognitive and noncognitive skills explains a variety of labor-market and behavioral outcomes.
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content_tags.findings[0]the tagger's words
content_tagsFor many dimensions of social performance, cognitive and noncognitive skills are equally important.
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content_tags.findings[1]the tagger's words
content_tagsNoncognitive skills shape schooling choices and additionally raise wages conditional on schooling.
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content_tags.findings[2]the tagger's words
content_tagsSchooling raises measured test scores.
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content_tags.findings[3]the tagger's words
content_tagsMale GED holders have a worse noncognitive ability distribution than dropouts.
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content_tags.findings[4]the tagger's words
content_tagsNoncognitive rather than cognitive ability is what mainly explains differences in criminal participation.
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content_tags.findings[5]the tagger's words
content_tagsThe two latent skills carry different hedonic prices in the labor markets of different schooling levels.
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content_tags.findings[6]the tagger's words
content_tagsEstimated returns to ability shrink when test scores are corrected for the schooling attained at test date, showing that endogenous test scores bias conventional OLS estimates upward.
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content_tags.findings[7]the tagger's words
content_tagsGED
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also in: GED
content_tags.definitions[0]the tagger's words
content_tagsAFQT
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also in: AFQT
content_tags.definitions[1]the tagger's words
content_tagsillegal activities
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content_tags.definitions[2]the tagger's words
content_tagsRotter Internal-External Locus of Control Scale
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content_tags.definitions[3]the tagger's words
content_tagsrisky behaviors
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content_tags.variables[2]the tagger's words
content_tagscognitive skills
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content_tags.variables[3]the tagger's words
content_tagsschooling level at the time of the test
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content_tags.variables[5]the tagger's words
content_tagsgender
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also in: gender
content_tags.variables[6]the tagger's words
content_tagsethnicity dummies
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content_tags.variables[7]the tagger's words
content_tagscohort dummies
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content_tags.variables[8]the tagger's words
content_tagslocal labor market conditions
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content_tags.variables[9]the tagger's words
content_tagsregion of residence dummies
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content_tags.variables[10]the tagger's words
content_tagswork experience
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content_tags.variables[11]the tagger's words
content_tagschoice of occupation
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content_tags.variables[12]the tagger's words
content_tagsemployment
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also in: employment
content_tags.variables[13]the tagger's words
content_tagsschooling
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also in: schooling
content_tags.variables[14]the tagger's words
content_tags9% — share of the variance of log wages explained by the cognitive ability measure when schooling is not controlled for
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[0]the tagger's words
content_tags0.9% — share of the variance of log wages explained by the noncognitive measure for men
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[1]the tagger's words
content_tags77% — proportion of the trace of the male cognitive test-score correlation matrix explained by a single factor
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[2]the tagger's words
content_tags31% — proportion of the trace of the noncognitive correlation matrix explained by a single factor, much lower than for cognitive scores
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[3]the tagger's words
content_tags2 to 4 percentage points — increase in measured AFQT score produced by each additional year of schooling
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[4]the tagger's words
content_tags66% — share of the Perry Preschool treatment group graduating from high school by age 18
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[5]the tagger's words
content_tags431.65 with 150 degrees of freedom — chi-squared statistic rejecting the null that schooling does not affect measured cognitive tests for males
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[6]the tagger's words
content_tags116.53 with 40 degrees of freedom — chi-squared statistic rejecting the null that schooling does not affect the noncognitive measurement equations
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[7]the tagger's words

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