A Democratic Peace Revisited
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A Democratic Peace Revisited Measuring Democracy in International Relations Lars Wilhelmsen Cand. polit. thesis Department of Political Science UNIVERSITY OF OSLO April 2006 3 Table of Contents TABLE OF CONTENTS............................................................................................................................3 FIGURES AND TABLES ...............................................................................................................................4 ACKNOWLEDGEMENTS........................................................................................................................5 1. INTRODUCTION ............................................................................................................................7 2. THE CONCEPT OF DEMOCRACY...........................................................................................17 2.1 DEFINING DEMOCRACY ................................................................................................................18 2.1.1 Democracy in history and philosophy ..............................................................................18 2.1.2 Democracy in political science and international relations .............................................22 2.2 MEASURING DEMOCRACY ............................................................................................................26 2.2.1 The Polity dataset .............................................................................................................26 2.2.2 Freedom House.................................................................................................................30 2.2.3 The Polyarchy dataset.......................................................................................................35 2.2.4 Other contributions...........................................................................................................40 2.2.5 Summary ...........................................................................................................................42 3. THE DEMOCRATIC PEACE ......................................................................................................45 3.1 LEVEL OF ANALYSIS AND TYPE OF CONFLICT ................................................................................45 3.2 DEMOCRATIC PEACE IN HISTORY ..................................................................................................46 3.3 EXPLAINING THE DEMOCRATIC PEACE ..........................................................................................48 3.4 DEMOCRACY AND THE DEMOCRATIC PEACE .................................................................................56 4. APPLYING POLYARCHY TO INTERNATIONAL RELATIONS ANALYSES...................59 4.1 ADVANTAGES TO THE POLYARCHY DATASET ...............................................................................59 4.1.1 A parsimonious measure of democracy ............................................................................59 4.1.2 An objective measure of democracy..................................................................................60 4.1.3 Transparency ....................................................................................................................61 4.1.4 Ease of maintainability .....................................................................................................62 4.1.5 Flexibility of application...................................................................................................62 4.1.6 A continuous measure of democracy ................................................................................63 4.2 POSSIBLE PROBLEMS AND DISCUSSION .........................................................................................67 4.3 THE CODING PROCESS FOR THE POLYARCHY DATA SET ................................................................71 5. THEORETICAL IMPLICATIONS AND RESEARCH DESIGN.............................................75 5.1 EXPECTATIONS BASED ON THE LITERATURE .................................................................................75 5.2 RESEARCH DESIGN .......................................................................................................................79 4 5.2.1 Qualitative versus qantitative methods ............................................................................ 79 5.2.2 Replication ....................................................................................................................... 81 5.3 CHOICE OF STUDIES ..................................................................................................................... 82 5.3.1 Peace and democracy 1946–2002 ................................................................................... 82 5.3.2 Dangerous dyads revisited – again.................................................................................. 89 6. EMPIRICAL ANALYSIS............................................................................................................. 97 6.1 BIVARIATE RESULTS : PEACE AND DEMOCRACY 1946-2002......................................................... 97 6.2 MULTIVARIATE RESULTS : DANGEROUS DYADS REVISITED – AGAIN ........................................... 104 7. CONCLUTIONS.......................................................................................................................... 111 7.1 SUMMARY OF FINDINGS ............................................................................................................. 111 7.2 IMPLICATIONS FOR FUTURE RESEARCH ...................................................................................... 113 REFERENCES....................................................................................................................................... 117 APPENDICES ........................................................................................................................................ 127 APPENDIX A: SAMPLE POLYARCHY COUNTRY CODING SHEET ............................................................. 127 APPENDIX B: ALTERNATE STATISTICAL MODELS ................................................................................. 129 Figures and tables FIGURE 1.1 AVERAGE POLYARCHY SCORE 1810–2002 .............................................................................. 14 FIGURE 2.1 FREEDOM HOUSE ELECTORAL DEMOCRACIES 2005................................................................. 33 FIGURE 2.2 SHARE OF DEMOCRACIES IN THE WORLD 1816–2002................................................................ 38 FIGURE 4.1 OVERVIEW OF POLITY IV SCORES , 1810–2002......................................................................... 65 FIGURE 4.2 SPREAD OF POLYARCHY : COMPETITION AND PARTICIPATION VALUES , 2002............................ 66 FIGURE 4.3 POLITY AND POLYARCHY DISTRIBUTION OF OBSERVATIONS , 2002 ........................................... 66 FIGURE 6.1 SHARE OF DEMOCRACIES AND INTERNATIONAL CONFLICT , 1946–2002 .................................... 99 FIGURE 7.1 SPREAD OF NORMALIZED POLITY AND POLYARCHY VALUES , 2002......................................... 114 TABLE 2.1 DEFINITIONAL AND CONCEPTUAL CONTRIBUTIONS IN RESEARCH ON DEMOCRATIZATION .......... 25 TABLE 2.2 OVERVIEW OF THE POLITY IV COMPONENT VARIABLE MATRIX ................................................. 28 TABLE 4.1 VARIABLES INCLUDED IN THE MAIN POLYARCHY INDEX (ID) TABLE ......................................... 73 TABLE 6.1 MONADIC DEMOCRACY AND INCIDENCE OF ARMED CONFLICT ................................................... 97 TABLE 6.2 DYADIC DEMOCRACY AND INCIDENCE OF ARMED CONFLICT , 1946–2002................................ 100 TABLE 6.3 DYADIC DEMOCRACY AND INCIDENCE OF ARMED CONFLICT , 1989–2002................................ 101 TABLE 6.4 INCIDENCE OF ARMED CONFLICT BETWEEN DEMOCRACIES , 1946–2002 .................................. 102 TABLE 6.5 DYADIC WAR ONSET 1816–1993: POLYARCHY AND COMPETITION ........................................ 105 TABLE 6.6 DYADIC WAR ONSET , 1816–1993: POLITY 4 AND PARTICIPATION .......................................... 106 TABLE 6.7 DYADIC WAR ONSET , 1816–1993: POLITY 4 AND POLYARCHY (ONLY SHARED OBS .)............. 109 5 Acknowledgements First and foremost I would wish to thank my advisor Nils Petter Gleditsch, who provided me with the opportunity to start writing this thesis under his supervision in an excellent research environment at The International Peace Research Institute, Oslo (PRIO). He also deserves special thanks for taking me back on and making himself available again after I took a prolonged ‘absence without leave’, failing to show any sign of progress. His comments, insights and positive reinforcement have proven invaluable to me. Similar thanks go to my also-advisor and former colleague at PRIO, Håvard Strand, for taking the time from his busy schedule during his interlude in Oxford along with impending fatherhood to provide constructive advice and critique. Halvard Buhaug also deserves mention for making his data available and for providing topical comments and assistance. Likewise, I would like to express my thanks to my friend and former PRIO colleague Jonas Uchermann for relentlessly nagging me about finishing this thesis. These thanks also extend to his better half, Anette, for assisting him in doing so. Jonas also deserves thanks for proofreading a late draft. Henrik Urdal and other former colleagues at PRIO also provided feedback and suggestions at an early stage