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        <title>Electoral Institutions and Legislative Behavior: Explaining Voting Defection in the European Parliament</title>
        <author>Simon Hix</author>
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        <bibl>
          <title>Electoral Institutions and Legislative Behavior: Explaining Voting Defection in the European Parliament</title>
          <date>2004</date>
          <publisher>World Politics</publisher>
          <idno type="DOI">10.1353/wp.2004.0012</idno>
          
          <idno type="record">hix2004-electoral-institutions-and-legisla</idno>
          <note type="staged-file">hix2004-electoral-institutions-and-legisla.txt, the project's staged copy</note>
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          <note type="rights">open-access</note>
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      <span xml:id="t0" type="claim_type" ana="#claim_type" resp="#paper">
        <label>mechanism</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t1" type="phenomenon" ana="#phenomenon" resp="#paper">
        <label>legislative voting defection</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t2" type="method" ana="#method" resp="#paper">
        <label>observational-study</label>
        <term>observational-study</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t3" type="mechanisms" ana="#mechanisms[0]" resp="#tagger">
        <label>mechanisms</label>
        <term>Centralized candidate selection gives the national leadership a credible power to punish, so the MEP anticipates the cost and complies with national instructions</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t4" type="mechanisms" ana="#mechanisms[1]" resp="#tagger">
        <label>mechanisms</label>
        <term>The MEP weighs the cost of defecting from each principal and votes for whichever side leaves her better off, an expected-utility calculation</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t5" type="mechanisms" ana="#mechanisms[2]" resp="#tagger">
        <label>mechanisms</label>
        <term>Where individual candidate votes decide electoral fortunes, reelection-seeking legislators cultivate a personal following independent of the party, which loosens party discipline</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t6" type="limitations" ana="#limitations[0]" resp="#tagger">
        <label>Statistical significance is inflated by the very large number of vote-decision observations.</label>
        <note>what this limits: every significance claim in the paper: THE EFFECT OF MOST OF THE INDEPENDENT VARIABLES IS HIGHLY SIGNIFICANT, PRIMARILY BECAUSE OF THE LARGE NUMBER OF OBSERVATIONS</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t7" type="limitations" ana="#limitations[1]" resp="#tagger">
        <label>Policy conflict between an MEP&#x27;s two principals is not observed directly but approximated by survey-based distance measures.</label>
        <note>what this limits: the policy-conflict variables: THESE ARE PROXY MEASURES OF POLICY CONFLICT BETWEEN THE TWO PARTY PRINCIPALS, built from survey distances rather than observed</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t8" type="limitations" ana="#limitations[2]" resp="#tagger">
        <label>The party-group coefficients do not generalise to MEPs in the largest national delegations because of how the model is specified.</label>
        <note>what this limits: the party-group results: BECAUSE OF THE STRUCTURE OF THE MODEL, THESE RESULTS ... APPLY ONLY TO THOSE MEPS WHO ARE NOT MEMBERS OF THE FIVE LARGEST NATIONAL DELEGATIONS</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t9" type="limitations" ana="#limitations[3]" resp="#tagger">
        <label>One of the two policy-conflict predictors does not yield a clear result for national-party defection.</label>
        <note>what this limits: the national-party defection result specifically: THE EFFECT OF THE EU-INTEGRATION POLICY DISTANCE ... IS LESS CLEAR</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t10" type="limitations" ana="#limitations[4]" resp="#tagger" cert="1.0">
        <label>A formal category is collapsed into a different one on the basis of how voters behave, not on the rule that defines it: semiopen-list systems are treated as closed-list because voters in practice choose the preordered list.</label>
        <note>what this limits: the candidate-centred versus party-centred classification of electoral systems: semiopen-list systems are placed with closed-list ones because of observed voter behaviour rather than the rule</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t11" type="limitations" ana="#limitations[5]" resp="#tagger" cert="1.0">
        <label>The key explanatory variable is measured by proxy, and the reason given is endogeneity rather than validity: the observed quantity would be caused by the thing being explained.</label>
        <note>what this limits: the conflict variable as a measure of conflict in the vote at hand: it is a proxy, adopted because conflict observed in a particular vote is endogenous to the vote decisions being explained</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t12" type="limitations" ana="#limitations[6]" resp="#tagger" cert="1.0">
        <label>One side of the model is assumed non-strategic, and the assumption is adopted because the quantity involved is endogenous.</label>
        <note>what this limits: the party group&#x27;s behaviour in this model: it is assumed not to act strategically when issuing voting instructions, while the national party is allowed to</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t13" type="limitations" ana="#limitations[7]" resp="#tagger" cert="1.0">
        <label>The arguments the article sets out to adjudicate are reported as never having been tested.</label>
        <note>what this limits: the debate over a single European electoral system: the article states the existing arguments have remained normative</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t14" type="limitations" ana="#limitations[8]" resp="#tagger" cert="0.9">
        <label>The merged electoral-system class is a modelling decision resting on a behavioural generalisation - that parties control who gets elected, so voter preferences for individuals rarely matter - and every result for that class inherits it.</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t15" type="controls" ana="#controls[0]" resp="#tagger" cert="0.95">
        <label>a vector of 1,031 dummy variables, one for every vote</label>
        <note>eliminates: that the estimate is driven by the differing defection rates and political salience of particular votes rather than by the electoral institution · outcome (stated by the tagger, no quotation): held</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t16" type="concepts" ana="#concepts[0]" resp="#paper">
        <label>policy conflict</label>
        <term>policy conflict</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t17" type="concepts" ana="#concepts[1]" resp="#paper">
        <label>closed-list proportional representation</label>
        <term>closed-list proportional representation</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t18" type="concepts" ana="#concepts[2]" resp="#paper">
        <label>semiopen-list PR systems</label>
        <term>semiopen-list PR systems</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t19" type="concepts" ana="#concepts[3]" resp="#paper">
        <label>roll-call votes</label>
        <term>roll-call votes</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t20" type="concepts" ana="#concepts[4]" resp="#paper" cert="0.95">
        <label>closed-list</label>
        <term>closed-list</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t21" type="senses" ana="#senses[0]" resp="#tagger" cert="1.0">
        <label>electoral system - AS FORMAL RULE: semiopen- or ordered-list PR, where voters may vote for the list or for an individual politician</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t22" type="senses" ana="#senses[1]" resp="#tagger" cert="1.0">
        <label>electoral system - AS PRACTICE: the same systems classified with closed-list PR, because votes for individual candidates rarely decide who is elected</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t23" type="senses" ana="#senses[2]" resp="#tagger" cert="1.0">
        <label>policy conflict - a PROXY measure between the two party principals, preferred over the conflict actually observed in a vote precisely because the observed version is endogenous</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t24" type="senses" ana="#senses[3]" resp="#tagger" cert="0.95">
        <label>policy conflict - measured by proxy ON PURPOSE: observed per-vote conflict is rejected as endogenous to the decision being explained, so the construct is measured away from the thing it predicts</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t25" type="claim_relations" ana="#claim_relations[0]" resp="#tagger">
        <label>builds-on → Gabel and Hix (2002), &quot;The European Parliament and Executive Politics in the EU&quot;</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t26" type="concept_edges" ana="#concept_edges[0]" resp="#tagger" cert="0.9">
        <label>semiopen-list PR systems —same-as→ closed-list</label>
        <term>semiopen-list PR systems</term>
        <term>closed-list</term>
        <note>differs in: NOTHING THAT MATTERS TO THE OUTCOME, WHICH IS THE POINT: the two are formally distinct - semiopen lists let voters express a preference for individuals - but &#x27;because parties control who gets elected, most semiopen-list PR systems are, IN PRACTICE, very similar to closed-list PR systems&#x27;. The formal distinction survives; the behavioural one does not · strength of the relation: 0.8 · note: A FORMAL CATEGORY COLLAPSED INTO ANOTHER ON THE EVIDENCE OF PRACTICE, and the record already carries both readings as senses of &#x27;electoral system&#x27; - AS FORMAL RULE and AS PRACTICE. The analysis then treats the merged class as one, so every downstream coefficient depends on this move.
Audit 2026-09-28: DOUBTFUL - read against its span and kept, but the span says most semiopen-list systems act like closed-list ones; same-as overstates it.</note>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t27" type="content_tags" ana="#content_tags.statistics[0]" resp="#tagger">
        <label>logistic regression</label>
        <term>logistic regression</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t28" type="content_tags" ana="#content_tags.statistics[1]" resp="#tagger">
        <label>fixed effects</label>
        <term>fixed effects</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t29" type="content_tags" ana="#content_tags.statistics[2]" resp="#tagger">
        <label>predicted probability</label>
        <term>predicted probability</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t30" type="content_tags" ana="#content_tags.statistics[3]" resp="#tagger">
        <label>confidence interval</label>
        <term>confidence interval</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t31" type="content_tags" ana="#content_tags.statistics[4]" resp="#tagger">
        <label>significance test</label>
        <term>significance test</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t32" type="content_tags" ana="#content_tags.findings[0]" resp="#tagger">
        <label>MEPs elected under institutions that weaken their national party&#x27;s grip — a candidate-centered electoral system, decentralized candidate selection, and large district magnitude — are less likely to vote against their European party group.</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t33" type="content_tags" ana="#content_tags.findings[1]" resp="#tagger">
        <label>The same three institutions push in the opposite direction for the other principal: candidate-centered voting rules, decentralized candidate selection, or a large district each make an MEP more likely to vote against her own national party.</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t34" type="content_tags" ana="#content_tags.findings[2]" resp="#tagger">
        <label>An MEP is more likely to vote against her national party only under a candidate-centered system combined with decentralized candidate selection.</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t35" type="content_tags" ana="#content_tags.findings[3]" resp="#tagger">
        <label>Longer service in the European Parliament lowers defection from the European party group but raises defection from the national party.</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t36" type="content_tags" ana="#content_tags.findings[4]" resp="#tagger">
        <label>Domestic legislative-executive design and territorial structure do not affect how MEPs vote in the European Parliament.</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t37" type="content_tags" ana="#content_tags.findings[5]" resp="#tagger">
        <label>Defection is rare overall: MEPs almost always voted with the majorities of both their European party group and their national party.</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t38" type="content_tags" ana="#content_tags.findings[6]" resp="#tagger">
        <label>National parties enforce their wishes best under closed-list PR, small districts or centralized candidate selection.</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t39" type="content_tags" ana="#content_tags.definitions[0]" resp="#tagger">
        <label>closed-list proportional representation (PR) system</label>
        <term>closed-list proportional representation (PR) system</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t40" type="content_tags" ana="#content_tags.definitions[1]" resp="#tagger">
        <label>semiopen- or ordered-list PR system</label>
        <term>semiopen- or ordered-list PR system</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t41" type="content_tags" ana="#content_tags.definitions[2]" resp="#tagger">
        <label>fully open-list PR system</label>
        <term>fully open-list PR system</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t42" type="content_tags" ana="#content_tags.definitions[3]" resp="#tagger">
        <label>single-transferable-vote (STV) system</label>
        <term>single-transferable-vote (STV) system</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t43" type="content_tags" ana="#content_tags.definitions[4]" resp="#tagger">
        <label>electoral institutions</label>
        <term>electoral institutions</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t44" type="content_tags" ana="#content_tags.definitions[5]" resp="#tagger">
        <label>an MEP&#x27;s two principals</label>
        <term>an MEP&#x27;s two principals</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t45" type="content_tags" ana="#content_tags.definitions[6]" resp="#tagger">
        <label>defection</label>
        <term>defection</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t46" type="content_tags" ana="#content_tags.definitions[7]" resp="#tagger">
        <label>the European Parliament as a laboratory</label>
        <term>the European Parliament as a laboratory</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t47" type="content_tags" ana="#content_tags.variables[0]" resp="#tagger">
        <label>electoral institution variables</label>
        <term>electoral institution variables</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t48" type="content_tags" ana="#content_tags.variables[1]" resp="#tagger">
        <label>Electoral System</label>
        <term>Electoral System</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t49" type="content_tags" ana="#content_tags.variables[2]" resp="#tagger">
        <label>Candidate Selection</label>
        <term>Candidate Selection</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t50" type="content_tags" ana="#content_tags.variables[3]" resp="#tagger">
        <label>District Magnitude</label>
        <term>District Magnitude</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t51" type="content_tags" ana="#content_tags.variables[4]" resp="#tagger">
        <label>policy conflict</label>
        <term>policy conflict</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t52" type="content_tags" ana="#content_tags.variables[5]" resp="#tagger">
        <label>MEP defection</label>
        <term>MEP defection</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t53" type="content_tags" ana="#content_tags.variables[6]" resp="#tagger">
        <label>seniority</label>
        <term>seniority</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t54" type="content_tags" ana="#content_tags.variables[7]" resp="#tagger">
        <label>EPG</label>
        <term>EPG</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t55" type="content_tags" ana="#content_tags.variables[8]" resp="#tagger">
        <label>NP</label>
        <term>NP</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t56" type="content_tags" ana="#content_tags.variables[9]" resp="#tagger">
        <label>VOTE</label>
        <term>VOTE</term>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t57" type="content_tags" ana="#content_tags.quantities[0]" resp="#tagger">
        <label>1,031 — roll-call votes held in the European Parliament between July 1999 and June 2000, cast by 626 sitting MEPs, producing 645,406 individual vote decisions</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t58" type="content_tags" ana="#content_tags.quantities[1]" resp="#tagger">
        <label>396,167 — vote decisions left in the analysis after exclusions, made by 526 MEPs from fifty-five national parties in fourteen member states</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t59" type="content_tags" ana="#content_tags.quantities[2]" resp="#tagger">
        <label>more than 30 percent — reduction in the probability of voting against one&#x27;s European party group for an MEP elected under the full set of institutions granting independence from the national party</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t60" type="content_tags" ana="#content_tags.quantities[3]" resp="#tagger">
        <label>approximately 20 percent — reduction in the probability of voting against one&#x27;s national party for an MEP elected under the full set of institutions giving the national leadership control</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t61" type="content_tags" ana="#content_tags.quantities[4]" resp="#tagger">
        <label>16 percent / 15 percent — EPP members are that much less likely, and PES members that much more likely, than the average MEP to vote against their European party group</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t62" type="content_tags" ana="#content_tags.quantities[5]" resp="#tagger">
        <label>33 percent (± 2 percent) — extra likelihood that British Conservative MEPs vote against their European party group relative to the average MEP (Model 3); in Model 8 they are 19 percent (± 7 percent) more likely to defect from their national party</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t63" type="content_tags" ana="#content_tags.quantities[6]" resp="#tagger">
        <label>7,504 — double defections in which an MEP voted yes or no directly against both principals — under 2 percent of all analysed vote decisions</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
      <span xml:id="t64" type="content_tags" ana="#content_tags.quantities[7]" resp="#tagger">
        <label>One hundred ninety-five MEPs (31 percent of the 626 members) — respondents to the EPRG survey used to build the left-right and EU-integration policy-distance measures</label>
        <note type="quotation-withheld">Quotation withheld because this record is not cleared for redistribution.</note>
      </span>
    </spanGrp>
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  <text>
    <body>
      <p><note type="rights">The full text of this article is not redistributable, so it is
      not included here. The evidence sentences are withheld with it; the tag layer and its
      grounding status remain. The article itself is at https://doi.org/10.1353/wp.2004.0012.</note></p>
    </body>
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