| Preface | 6 |
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| Contents | 8 |
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| Part I Characteristics of the Digital Economy | 16 |
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| 1 Introduction | 17 |
| 2 Digitalization | 21 |
| 2.1 Overview on Digitalization | 21 |
| 2.1.1 History | 21 |
| 2.1.2 Digitalization and the Internet | 22 |
| 2.1.2.1 Structure of the Internet | 22 |
| 2.1.2.2 General Purpose Technology | 23 |
| 2.1.3 Indices of Digitalization | 23 |
| 2.2 Characteristics of Networks, IT Servicesand Digital Goods | 25 |
| 2.2.1 Networks | 26 |
| 2.2.2 IT Services | 28 |
| 2.2.3 Digital Goods | 29 |
| 2.2.4 Related Topics | 30 |
| 2.2.4.1 Information and Communication Technology (ICT) | 30 |
| 2.2.4.2 Software on the Borderline Between Goods and Services | 32 |
| 2.2.4.3 Open-Source Software | 33 |
| 2.3 Recent Developments | 36 |
| 2.3.1 Networks | 36 |
| 2.3.1.1 Overview | 36 |
| 2.3.1.2 Peering and Transit | 36 |
| 2.3.1.3 Price Development | 37 |
| 2.3.1.4 Recent Innovations | 38 |
| 2.3.2 IT Services | 39 |
| 2.3.2.1 Overview | 39 |
| 2.3.2.2 Outsourcing and Offshoring | 39 |
| 2.3.2.3 Recent Innovations: Service-Oriented Architectures | 41 |
| 2.3.3 Digital Goods | 42 |
| 2.3.3.1 Overview | 42 |
| 2.3.3.2 Music Industry | 44 |
| 2.3.3.3 Recent Innovations | 45 |
| 2.3.4 Related Topics | 45 |
| 2.3.4.1 Computer Power and Price Measurement | 45 |
| 2.3.4.2 ICT | 48 |
| 2.3.4.3 Voice over IP | 49 |
| 2.3.4.4 E-Commerce | 50 |
| 2.3.4.5 Digital Divide | 51 |
| 2.4 The Impact for Productivity: Results fromICT Research | 53 |
| 2.4.1 Introduction | 53 |
| 2.4.2 Theoretical Foundations: Neoclassical Growth Assumptions | 54 |
| 2.4.2.1 Neoclassical Case | 54 |
| 2.4.3 Productivity Accounting and Empirical Studies Regarding ICT | 56 |
| 2.4.3.1 Firm-Level Studies | 56 |
| 2.4.3.2 Sectoral Decomposition of Productivity Figures: Industry-Level Studies | 57 |
| 2.4.3.3 Macro-Level Studies and Sectoral Decomposition of TFP | 58 |
| 2.4.3.4 Interpretation and Limitations | 63 |
| 2.4.4 Productivity Measurement and Digital Goods | 66 |
| 2.4.4.1 Software Accounting | 67 |
| 2.4.5 Summary and Open Questions | 68 |
| 2.4.5.1 Common Sense | 68 |
| 2.4.5.2 Questions to be Solved | 69 |
| 2.5 Summary of Part I | 70 |
| Part II Economic Theory | 71 |
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| 3 Theoretical Foundations | 72 |
| 3.1 Some Microeconomic Aspects | 72 |
| 3.1.1 Networks | 72 |
| 3.1.2 IT Services | 73 |
| 3.1.3 Digital Goods | 74 |
| 3.1.4 Market Structure | 75 |
| 3.2 Dynamics of Two-Sided Markets | 77 |
| 3.2.1 Introduction | 77 |
| 3.2.2 Two Sided Markets: Literature Overview | 78 |
| 3.2.2.1 Empirical Evidence and Anti-Trust Policy | 80 |
| 3.2.3 Model: Basic Set-Up of Two-Sided MarketsOptimization | 80 |
| 3.2.4 Model: Development of a Business Strategy | 84 |
| 3.2.4.1 Splitting the Phases | 84 |
| 3.2.5 Summary | 90 |
| 3.3 Theories on Internationalization | 90 |
| 3.3.1 Key Drivers in Management Literature | 90 |
| 3.3.1.1 Business Strategies and Internationalization | 90 |
| 3.3.1.2 IT Outsourcing and IT Offshoring | 93 |
| 3.3.2 Macroeconomic Theorieson Internationalization | 97 |
| 3.3.2.1 Traditional Approaches: Trade and FDI | 97 |
| 3.3.2.2 Theory on Fragmentation | 98 |
| 3.4 IT Administration Rights | 99 |
| 3.4.1 Introduction | 99 |
| 3.4.2 The Model of IT Administration Rights | 100 |
| 3.4.3 Distribution of IT Administration Rights | 103 |
| 3.4.4 Potential Caveats | 104 |
| 3.4.5 Alternative Formulation | 105 |
| 3.4.6 Summary and Outlook | 107 |
| 4 Networks in a Fragmentation Model | 108 |
| 4.1 Setup of the Model | 108 |
| 4.2 Trade-Off Between International and Local Producers | 112 |
| 4.3 Digitalization | 113 |
| 4.4 Interpretation | 115 |
| 5 IT Services in a General Equilibrium Macro-Model | 116 |
| 5.1 Introduction | 116 |
| 5.2 General Equilibrium in the Integrated Economy | 117 |
| 5.2.1 Structure of the Model | 117 |
| 5.2.2 Basic Set-Up: Integrated Economy | 118 |
| 5.2.2.1 Demand | 118 |
| 5.2.2.2 Production | 119 |
| 5.2.3 Organization | 120 |
| 5.2.3.1 Timing of the Nash Bargaining | 120 |
| 5.2.3.2 Optimal Output | 122 |
| 5.2.3.3 Comparison of Separation, Integration and Complete Contracts | 125 |
| 5.2.4 Ownership Structures | 127 |
| 5.2.5 General Equilibrium | 128 |
| 5.3 Two-Country Model | 132 |
| 5.3.1 Factor Price Equalization | 132 |
| 5.3.2 Trade in Intermediates | 138 |
| 5.3.3 Trade in IT Services | 139 |
| 5.4 Summary and Interpretation | 141 |
| 6 Model: Entry of a Digital Goods Producer | 142 |
| 6.1 Introduction | 142 |
| 6.2 Quality Competition | 142 |
| 6.2.1 Closed Economy | 142 |
| 6.2.2 Market Entry from Abroad | 147 |
| 6.3 Two-Sided Markets | 148 |
| 6.4 Interpretation | 152 |
| 6.4.1 Potential Expansion | 153 |
| 7 Comparison of the Models | 154 |
| 7.1 Framework | 154 |
| 7.2 Differences in Theoretical Structures | 155 |
| 7.3 Main Conclusions | 156 |
| Part III Economic Policy | 160 |
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| 8 General Political Perspectives | 161 |
| 8.1 Economic Policy: Principles, Objectives,and Instruments | 161 |
| 8.1.1 General Goals | 161 |
| 8.1.2 Principles of Economic Policyin the Digital Age | 161 |
| 8.1.3 Overcoming the Digital Divide | 163 |
| 8.1.4 Media Policy | 165 |
| 8.1.4.1 Trade-Off Between Culture and Business | 165 |
| 8.1.4.2 Broadcast Regulation | 166 |
| 8.1.5 Data Privacy and Safety | 167 |
| 8.1.6 Regulation and Competition Policy | 168 |
| 8.1.6.1 Conceptual Issues | 168 |
| 8.1.6.2 Modus Operandi in EU | 171 |
| 8.1.7 Digitalization, Employment, and Education | 172 |
| 8.1.8 Trade Policy | 174 |
| 8.1.8.1 Overview | 174 |
| 8.1.8.2 Types of Trade Agreements | 175 |
| 8.2 Institutional Players | 178 |
| 8.2.1 The WTO System | 178 |
| 8.2.1.1 Overview | 178 |
| 8.2.1.2 GATT | 178 |
| 8.2.1.3 GATS System | 179 |
| 8.2.1.4 Differences Between GATS and GATT | 181 |
| 8.2.1.5 TRIPS Agreement and WIPO | 181 |
| 8.2.1.6 ITA | 183 | <