The Markowitz model is still the cornerstone of modern portfolio theory. In particular, when focusing on the minimum-variance portfolio, the covariance matrix or better its inverse, the so-called precision matrix, is the only input required. So far, most scholars worked on improving the...

In this paper, I show that the "Bayesian inversion" of demand, which is defined as the posterior distribution of random utilities given realized choices, can replace Berry, Levinsohn, and Pakes (1995)’ "mean utility inversion" and radically simplify the estimation of discrete choice models...

This paper studies the dynamic responses of the conditional quantiles and their applications in macroeconomics and finance. We build a multi-equation autoregressive conditional quantile model and propose a new construction of quantile impulse response functions (QIRFs). The tool set of QIRFs...

The standard Zipf regression involves a linear relation between the natural logs of the rank and the natural logs of a score on a certain variable. If there are measurement errors in the scores, then the regressor is endogenous and renders Ordinary Least Squares inappropriate. Instrumental...

We extend LeSage and Pace's (2008) spatial autoregressive model for origin-destination flows by accommodating two-way fixed effects. Those fixed effects represent unobserved characteristics of origin and destination units. A partial likelihood approach is used to remove fixed effects in the...

In this paper, we consider robust estimation of claim severity models in insurance, when data are affected by truncation (due to deductibles), censoring (due to policy limits), and scaling (due to coinsurance). In particular, robust estimators based on the methods of trimmed moments...

The solutions to robust optimization problems are sometimes too conservative because of the focus on worst-case performance. For the least-squares (LS) problem, we describe a way to overcome this by combining the classical formulation with its robust counterpart. We focus on the issue of...

Abstract in Russian:В настоящем исследовании для определения ненаблюдаемых переменных разработаны полуструктурные макроэкономические модели для каждой страны региона...

We provide a new theory for nodewise regression when the residuals from a tted factor model areused. We apply our results to the analysis of the consistency of Sharpe Ratio estimators when there are many assets in a portfolio. We allow for an increasing number of assets as well as time...