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| Strategic Complementarities Between Different Types of ICT-expenditures | |||||||||
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| Abstract: This paper empirically tests for complementarities between three different types of expenditures in information and communication technologies (ICT). I find highly significant complementarities between expenditures in physical ICT capital and labor cost for ICT personnel as well as between physical ICT capital and ICT services. The results for the relationship between labor cost for ICT personnel and ICT services are mixed: while the indirect approach provides evidence for complementarity, the direct method does not. The estimation results also show that the partial productivity effect of physical ICT capital is largest, followed by ICT services and ICT personnel. | |||||||||
| Keywords: strategic complementarity, ICT--investment, multivariate Tobit model, production function JEL classification: C34, M11 Status: submitted |
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| Additional information: - Appendix A - correlation analysis - Appendix B - descriptive statistics of ICT variables - Appendix C - test of sample selection bias - Appendix D - descriptive statistics - Appendix E - additional regression results |
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