In recent years, with implementation and propulsion of the strategic planning "One Belt and One Road" of China, quality and efficiency of China's foreign direct investment have increasingly become a focused issue. This paper utilizes the DEA model and Malmquist index method to select the data of...

We combine exogenous variation in union membership with detailed administrative data and a novel field survey to estimate the career effects of labor union membership. In the survey, we show how workers perceive the role of unions in setting wages and determining work amenities. In the...

We combine exogenous variation in union membership with detailed administrative data and a novel field survey to estimate the career effects of labor union membership. In the survey, we show how workers perceive the role of unions in setting wages and determining work amenities. In the...

With the introduction of many derivatives into the capital market, including stock index futures, the trading strategies in financial markets have been gradually enriched. However, there is still no theoretical model that can determine whether these strategies are effective, what the risks are,...