This paper develops two tests for parametric volatility function of a diffusion model based on Khmaladze (1981)’s martingale transformation. The tests impose no restrictions on the functional form of the drift function and are shown to be asymptotically distribution-free. The tests are...

Purpose– This study aims to propose a model-free statistic that tests asymmetric correlations of stock returns, in which stocks move more often with the market when the market goes down than when it goes up, and then empirically analyze the asymmetric correlations of the China stock market and...

This paper extends Hong et al. (2007)’s model-free test to analyze the contagion. A simulation experiment reveals that our test has reasonable size and good power in finite sample. We use this test and find the strong evidence of contagion between crude oil and stock markets.

The ag-biotech industry underwent considerable consolidation in the last decade in part to take advantage of economics of scale and scope. The paper investigates the impact of such consolidation on inventive activity at the firm level. Careful attention is paid to the role of firm size,...

A small-scale combined cooling and power (CCP) system usually serves district air conditioning apart from power generation purposes. The typical system consists of a gas turbine and an exhaust gas-fired absorption refrigerator. The surplus heat of the gas turbine is recovered to generate cooling...

The size of nations matters, but the literature on the subject is long on theory and short on direct econometric testing. Using a unique time series data set spanning the past two millennia, we study the process of unification and division in historical China. The empirical results are...