Estimation of the covariance matrix of asset returns is crucial to portfolio construction. As suggested by economic theories, the correlation structure among assets differs between emerging markets and developed countries. It is therefore imperative to make rigorous statistical inference on...

In assessing the mechanism of treatment efficacy in randomized clinical trials, investigators often perform mediation analyses by analyzing if the significant intent-to-treat treatment effect on outcome occurs through or around a third intermediate or mediating variable: indirect and direct...

Abstract We address several questions relating to the use of standard regression and Structural Nested Mean Model (SNMM) approach (e. g., Ten Have et al. 2007) to analyze post-randomization effect modifiers of the intent-to-treat effect of a randomized intervention on a subsequent outcome,...

Abstract An instrumental variable can be used to test the causal null hypothesis that an exposure has no causal effect on the outcome, by assessing the association between the instrumental variable and the outcome. Under additional assumptions, an instrumental variable can be used to estimate...

This paper examines experiments on interdependent security prisoner's dilemma games with repeated play. By utilizing a Bayesian hierarchical model, we examine how subjects make investment decisions as a function of their previous experience and their treatment condition. Our main findings are...

By introducing development situation of specialized cooperatives and vegetable specialized cooperatives in China, this paper discussed existing problems in the process of development of China’s vegetable specialized cooperatives. Then, it made efficiency evaluation on typical vegetable...

We examine the determinants of voluntary adoption of IFRS by medium-to-large UK unlisted firms (8417 firms comprising 287 IFRS firms and 8130 non-IFRS firms in 2009). Analysing voluntary adoption allows us to better understand the cost/benefits of choosing a specific set of accounting standards....

To promote the development of Social Life Cycle Assessment (SLCA), we conducted a comprehensive review of recently developed frameworks, methods, and characterization models for impact assessment for future method developers and SLCA practitioners. Two previous reviews served as our foundations...

Malmendier and Shanthikumar (2014) find that some analysts issue relatively higher stock recommendations and relatively lower earnings forecast of the same firm on the same day. They describe this behavior as speaking in two different tongues. In this paper, we explore the cost of this strategy...