TABLE OF CONTENTS
Acknowledgernents
Introduction
Foreword

Introduction
1.1 The chailenges ofthe digital economy
11.2 Entry and competition in telecommunications niarkets
1.3 Thesis contributions and outline
1. Product differentiation with bundies of cha ractcristics and niultipurchasing
1.1 Introduction
1.2 A model of horizontal ditferentiation vjtli bundies ofcharacteristics
1.3 Analysis
1.3.1 One-sided environrnent
1.3.2 Multisidcd cnvironrnent
1.4 Welfare analvsis
1.5 Mergers
1.6 Conclusion
Appendix

2. Information retention and optimal disclosure rule
2.1 Introduction
2.2 The model
2.3 Equilibtium disclosure behavior
2.4 Optimal disclosure rule
2.5 Incentives to acquire a more precise signal
2.6 Extension: on the decision maker's cost to process information
2.7 Conclusion
3. Entry and upstream competition ia the Chilean telecommunications Market
3.1 Introduction
3.2 The market and the effccts of entry
3.2.1 The market for mobile telecommunicatioiis in Chile
3.2.2 Dataset
3.2.3 The etïect ofentr on prices and market shares
3.3 Model
3.3.1 Demand
3.3.2 Supply model
3.4 Estimation and counterfactual analysis
3.5 Conclusion
Appendices
A. 1 Hedonic price regressions
A.2 ('omputation ofdeinand deriaties x,.ith respeci to price
Conclusion