The paper studies a generic bilateral trade model with relationship-specific investments. Only the seller invests, and subsequent trade becomes inefficient if his investments are too low. We show that the seller may defect strategically under a fixed-price contract even though he attains any...

The econometric literature offers various modeling approaches for analyzing micro data in combination with time series of aggregate data. This paper discusses the estimation of a VAR model that allows unobserved heterogeneity across observation unit, as well as unobserved time-specific...

Celem opracowania jest analiza zasadnosci wykorzystania metody Valua at Risk w szacowaniu ryzyka zwiazanego z inwestycja w spolki branzy metalurgicznej. W artykule przedstawiono sposob konstruowania modelu, rozne metody jego estymacji oraz ich wady i zalety. W czesci badawczej artykulu...

The paper presents empirical results on the discounting of delayed payoffs which show that: (1) the best approximation of the discounting process is a hyperbolic function, (2) (both animals and humans) can reverse their preferences in time. The article presents theoretical conditions on the...

We examine the estimation problem for shape-restricted functions that are continuous, non-negative, monotone non-decreasing, and strictly concave. A sieve estimator based on bivariate Bernstein polynomials is proposed. This estimator is drawn from a sieve, a set of shape-restricted Bernstein...

English Abstract: The article presents an overview of selected connections of the COVID-19 pandemic with risk theories. The study first explores the basic concepts of preparing and mobilizing networks of public policy actors to act together under conditions of uncertainty. The following section...