This paper describes a way of constructing an ECM algorithm such that it converges at the rate of the EM algorithm. The approach is motivated by the well known conjugate directions algorithm, and a special case of it is when the parameters corresponding to different CM steps are orthogonal....

This paper uses wavelet theory to propose a frequency domain nonparametric and tuning parameter free family of unit root tests indexed by the fractional parameter d. The proposed test exploits the wavelet power spectrum of the observed series and its fractional partial sum to construct a test of...

This article addresses unit root testing on regulated series through the variance ratio (VR) statistic of Nielsen (2009). The asymptotic distribution of the regulated VR statistic is developed with and without OLS detrending. Results of Cavaliere and Xu (2011) are extended by also developing the...

In this paper we develop a general model of one-sided and two-sided platform businesses and apply it to a monopolist framework. We have a particular interest in how the social loss and other metrics depend on the strength of the network (direct or indirect) effect. We study how network effects...

In this paper we apply a general model of one-sided and two-sided platform businesses to a collusive framework which we model as joint profit maximization. We have a particular interest in how the social loss and other metrics depend on the strength of the network (direct or indirect) effect. We...

In this paper we apply a general model of one-sided platform businesses to a duopoly competitive framework. We have a particular interest in how the option of multi-homing affects the competitive dynamic. We find that if multi-homing is precluded, the incumbent platform is always able to...

This paper develops a nonlinear spatial autoregressive model. Of particular interest is a structural interaction model for share data. We consider possible instrumental variable (IV) and maximum likelihood estimation (MLE) for this model, and analyze asymptotic properties of the IV and MLE based...

How a macroeconomic policy package is designed depends critically on whether the economy in question is supply constrained or demand constrained. In simple terms, this may often be seen in terms of whether the policies should try to augment demand or to raise productive capacity. The question is...

The Investment Climate surveys (ICSs) are valuable instruments which improve our understanding of the economic, social, political and institutional factors determining economic growth, particularly in emerging and transition economies. However, at the same time, they have to overcome some...