Capital Ideas: Modeling and Measuring Factors in the Knowledge Capital Model

Ronald Davies and James R. Markusen

Review of International Economics, 2025, vol. 33, issue 4, 898-910

Abstract: One of the main challenges when analyzing multinational firms (MNEs) is that this group is comprised of a rich variety of firms engaged in a spectrum of activity. In response to the separate models describing one type of MNE or another, the Knowledge Capital model was developed in order to provide a unified framework. Although this did yield many empirically supported insights, it nonetheless had difficulty explaining the co‐existence of FDI and trade among similar countries, an issue given that most FDI and trade takes place between such nations. While this can be resolved by adding in an additional factor—capital—this raises several questions on how best to match the expanded theory to the data. In this paper, we provide a discussion on the various ways this literature treats capital in both theory and empirics, illustrate some of the difficulties in mapping the models to data, and provide suggestions for future research including a need to model capital markets and taxation.

Date: 2025
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