The literature on economics of transition has suggested a number of scenarios to explain unemployment and labour reallocation in Eastern Europe. However, it has recently been argued that these so-called Optimal Speed of Transition (OST) studies do not account for many stylized facts concerning...

This work revisits the role of regulations in emergence o f the shadow economy. In particular, it supplements the previous theoretical research that mainly ignored the fact that the decision to “go underground” is essentially a result of both employers and employees interacting in the labour...

This paper analyses the emergence of the informal economy in the environment characterised by non-competitive labour markets with wage bargaining. We develop a simple extension of the standard search model à la Pissarides (2000) with formal and informal sectors to show how a government’s...

A number of methods has already been proposed for creating a valid correlation matrix in finance. However, such methods do not normally take into account additional restrictions on matrix elements imposed by specific non-arbitrage conditions in some markets, e.g. foreign exchange (FX). I suggest...

We consider the problem of finding a valid covariance matrix in the FX market given an initial non-PSD estimate of such a matrix. The standard no-arbitrage assumption implies additional linear constraints on such matrices, which automatically makes them singular. As a result, one cannot just...

We consider the problem of finding a valid covariance matrix in the FX market given an initial non-PSD estimate of such a matrix. The standard no-arbitrage assumption implies additional linear constraints on such matrices, which automatically makes them singular. As a result, one cannot just...