Roll (J Financ 43:541–566, <CitationRef CitationID="CR42">1988</CitationRef>) argues that firm-specific stock return volatility may result either from informed trading or from noise trading that is unrelated to information. In this paper we provide evidence that insider purchases are inversely related to the idiosyncratic volatility of...</citationref>

Minimization of the L∞ norm, which can be viewed as approximately solving the non-convex least median estimation problem, is a powerful method for outlier removal and hence robust regression. However, current techniques for solving the problem at the heart of L∞ norm minimization are slow,...

This paper analyzes the determinants of bond flows, now the dominant source of capital inflows, into the United States, as a means of establishing conditions affecting the financing of the U.S. current account deficit. To test the hypothesis that capital flows have become more responsive to...

Statistical offices try to match item models when measuring inflation between two periods. However, for product areas with a high turnover of differentiated models, the use of hedonic indexes is more appropriate since they include unmatched new and old models. There are two main competing...