We provide a Matlab quadratic optimization tool based on Markowitz's citical line algorithm that significantly outperforms standard software packages and a recently developed operations research algorithm. As an illustration: For a 2000 asset universe our method needs less than a second to...

The finite state Markov-Chain approximation method developed by Tauchen (1986) and Tauchen and Hussey (1991) is widely used in economics, finance and econometrics in solving for functional equations where state variables follow an autoregressive process. For highly persistent processes, the...

The conventional lists of stylized facts are composed of sentences about the comovement of ordinary macroeconomic time-series and the business cycle. It is argued that these lists are incomplete because heterogeneous agent stylized facts are missing. But there is evidence about the heterogeneity...

An essential feature of Schumpeter’s business cycle theory is the attempt to explain the macrodynamics of an economy by means of innovative heterogeneous agents. It has been criticized for being theoretically inconsistent as well as for its lack of empirical confirmation. In particular, the...

We study the role of heterogeneity in the revenues of individual firms for euro area macroeconomic dynamics. To this end, we specify two models: a standard aggregate vector autoregressive model (VAR) and an "heterogeneous VAR" (HVAR). The VAR model includes only aggregate data, while the HVAR...

We study the role of heterogeneity in the revenues of individual firms for euro area macroeconomic dynamics. To this end, we specify two models: a standard aggregate vector autoregressive model (VAR) and an "heterogeneous VAR" (HVAR). The VAR model includes only aggregate data, while the HVAR...