Profitability, Ownership Structure and Technical Efficiency of Enterprises in the People's Republic of China: A Case of Manufacturing Industries in Shanghai

This paper studies the relationship between accounting profits and technical efficiency of manufacturing enterprises in Shanghai during the period 1989–1992 and examines which factors affect the profitability of manufacturing enterprises. We first estimate the average technical efficiency of four major manufacturing industries in Shanghai. Then, we test for the presence of ownership effects of technical efficiency on profits of those enterprises in these four industries.     

The Informational Role of Stock and Option Volume

This article analyzes the intraday interdependence of orderflows and price movements for actively traded NYSE stocks andtheir Chicago Board Options Exchange (CBOE)-traded options.Stock net trade volume (buyer-initiated volume minus seller-initiatedvolume) has strong predictive ability for stock and option quoterevisions, but option net trade volume has no incremental predictiveability. This suggests that informed investors initiate tradesin the stock market but not in the option market. On the otherhand, both stock and option quote revisions have predictiveability for each other. Thus, while information in the stockmarket is contained in both quote revisions and trades, informationin the option market is contained only in quote revisions.     

Stakelberg竞争条件下的药品专利许可问题研究——“医药分离”与“以药养医”两种医疗体制的微观福利比较

本文分析了在“医药分离”与“以药养医”两种医疗体制下,专利药企业和仿制药企业达成药品专利许可协议的条件,以及该许可对患者和医生的福利影响.研究发现:在特定条件下,与仿制药企业达成药品专利许可协议对专利药企业是有利的.在“医药分离”的体制下,该许可会改善患者的福利水平;在“以药养医”的体制下,该许可会改善医生的福利水平,但是如果专利药与仿制药的医疗保险报销百分比差距较大,并且两种药品的差异化程度较高,该许可会降低患者的福利水平.因此,监管部门应该仔细评估药品专利许可的福利影响,对某些会损害患者福利的许可,应该采取措施加以限制.     

ECONOMIC ANALYSIS IN THE MAINTENANCE,REPAIR, AND OVERHAUL INDUSTRY: AN OPTIONS APPROACH

This paper presents a practical case application of the real options framework to a multi-stage investment in the aerospace maintenance, repair, and overhaul (MRO) industry. With the deregulated commercial airline industry and military procurement reform, the $44 billion MRO sector must implement tools to remain strategically poised. In this case study, the MRO participant values a multi-stage irreversible expenditure in maintenance equipment and processes under air travel demand uncertainty using a real options analysis. The investment scenario is viewed from a delay, growth, and compound options framework, and an appropriate sensitivity analysis is performed. The main contribution of this paper is the detailed real option framing, valuation, and discussion that may be used as an illustration for industry practitioners or classroom instruction.     

TESTING THE NET BUYING PRESSURE HYPOTHESIS DURING THE ASIAN FINANCIAL CRISIS: EVIDENCE FROM HANG SENG INDEX OPTIONS

We investigate net buying pressure in the Hong Kong Hang Seng Index options market during the Asian financial crisis from July 1997 to August 1998. Our findings suggest that during this period, the dramatic changes in volatility overwhelmed the dynamics of supply and demand in the options market. The extremely high realized volatility drove market participants' expectations about future market volatility in the early months of the crisis. Findings during the late‐crisis, pre‐crisis, and post‐crisis periods are consistent with the net buying pressure hypothesis.     

Default risk and equity returns: Australian evidence

We test whether default risk is related to equity returns using the Fama and MacBeth [Fama, E.F., MacBeth, J., 1973. Risk, return, and equilibrium: empirical tests. Journal of Political Economy 81, 607–636.] regression framework. The proxy we use for default risk is the default probability obtained from option-based models. Our findings show that default probability is negatively related to returns. While we find that size and book-to-market are related to default risk, the ability of these variables to explain cross-sectional variation in returns is not because they are proxying default risk. Further, our evidence suggests that the negative relationship between default probability and returns is not due to a leverage, volatility or momentum effect.     

An Empirical Re-Examination of the Cross-Section of Expected Returns: UK Evidence

This paper is a study of the Fama and French (1992) analysis in the UK context. Consistent with their findings, our results do not support a positive relationship between beta and average monthly returns. We find that book-to-market equity and market leverage are consistently significant in explaining UK average returns. Contrary to the Fama-French evidence, size has an insignificant effect on average returns. A puzzling negative beta-returns relationship is found in some monthly regressions,and results based on annual data reveal a reversal of betas for the smallest-size portfolios. Some possible explanations are offered for these findings.     

Ordinary least squares versus principal components regression: Some simulation evidence

Simulation experiments are used to compare OLS and several principal components (PCR) estimators of the classical linear regression model. According to mean square error and mean absolute error criteria OLS dominates PCR in these experiments.