As a typical unsupervised learning method, the TextRank algorithm performs well for large-scale text mining, especially for automatic summarization or keyword extraction. However, TextRank only considers the similarities between sentences in the processes of automatic summarization and neglects...

A fundamental idea in modern asset pricing is that risk aversion may be time varying and countercyclical (Campbell and Cochrane 1999). Existing evidence is scant and based mostly on experimental or survey data. We aim to test this key assumption using a large panel of real-world transaction...

This paper conducts an empirical study by province level data to analyze the relationship between China's human development and economic growth. The results of this study show that improvements of human development are followed by faster economic growth and influences of human capital derived...

We examine a simple measure of operating leverage: the ratio of fixed costs (measured by depreciation and amortization plus selling, general, and administrative expenses) to the market (or book) value of assets. We find that this measure of operating leverage positively predicts returns....