What is the fine-grained topic of the following text: Then, in the way of constructing the specification of the technical inefficiency in terms of various capital explanatory variables, we analyze the determinants of technical inefficiency of individual cities, and explore how the urban technical inefficiency is influenced by capital density, FDI, the domestic investment, while the impact of technical inefficiency on capital variables is investigated. Only return the topic.
Analyzing the Determinants of Urban Technical Inefficiency and its Influence by Various Capital Variables