We introduce a new statistical procedure for the identification of unobserved categories that vary between individuals and in which objects may span multiple categories. This procedure can be used to analyze data from a proposed sorting task data in which individuals may simultaneously assign...

In social network analysis, many estimation methods have been developed over the past three decades. Due to the computational complexity for analyzing large-scale social network data, however, those methods cannot be applied effectively. On the other hand, the structure of large-scale network...

This study empirically evaluates the impact of the Private Securities Litigation Reform Act of 1995 (PSLRA) and the Sarbanes Oxley Act of 2002 upon the (equity) risk of the largest US firms, the backbone of the US economy. Drawing from the literature, hypotheses are developed and empirically...

A novel approach to analyzing time series generated by complex systems, such as markets, is presented. The basic idea of the approach is the Law of Self-Similar Evolution, according to which any complex system develops self-similarly. There always exist some internal laws governing the evolution...

This paper uses multi-level factor models to characterize within- and between-block variations as well as idiosyncratic noise in large dynamic panels. Block-level shocks are distinguished from genuinely common shocks, and the estimated block-level factors are easy to interpret. The framework...

A new class of regression type models termed essentially linear models is proposed. The class is characterized by geometric considerations. Within the class the distribution of the maximum likelihood estimator is easily approximated by a natural extension of the pstar-formula even though the MLE...

Soccer coaches give contradictory advice about where to aim the soccer ball when shooting on goal. This article proposes an answer to the question of where to aim by asking not how to score but rather how to miss. The answer is then put to the test by examining the performance of top goal...

Hong Kong’s construction industry has shown substantial improvement in safety over the past decade. Many safety measures have been implemented such as Independent Safety Audit Scheme, The Occupational Health and Safety Assessment Series etc. With the help from Logit model, this chapter aims at...

This paper examines point and density forecasts from the European Central Bank’s Survey of Professional Forecasters. We derive individual uncertainty measures along with individual point- and density-based measures of disagreement. We also explore the relationship between uncertainty and...

Hedging of illiquid financial instruments is carried out with liquid instruments that, as a rule, have simpler payoff functions. For example, hedging of Asian or long-dated put options is carried out with vanilla puts, hedging of Bermuda swaptions is done with vanilla swaptions, etc. This kind...