Single Versus Multiple Randomization in Matching Mechanisms

The Strategy of Korean Multinational Enterprises – Multiple versus Single plant

Using firm-level panel data for Korean MNEs, we make a distinction between being the only affiliate of a parent firm and being the one of the multiple affiliates of a parent firm. Comparisons of correlations between purchases and sales of each group of the foreign affiliates show distinctive difference in the motivations of FDI and the multinational activities, due to the difference in the numb...

Optimal multivariate matching before randomization.

Although blocking or pairing before randomization is a basic principle of experimental design, the principle is almost invariably applied to at most one or two blocking variables. Here, we discuss the use of optimal multivariate matching prior to randomization to improve covariate balance for many variables at the same time, presenting an algorithm and a case-study of its performance. The metho...

Randomization , Rerandomization and Matching in Clinical Trials

Randomization was a key contribution of Sir Ronald Fisher to the conduct of scientific investigations. Along with the protective aspects of randomization, Fisher also noted that the distribution induced by randomization can form the basis of inference. Indeed, in some instances, the randomization test and related procedures seem to be the only tools available for inference. Several authors have...

Improved Single and Multiple Approximate String Matching

We present a new algorithm for multiple approximate string matching. It is based on reading backwards enough `-grams from text windows so as to prove that no occurrence can contain the part of the window read, and then shifting the window. Three variants of the algorithm are presented, which give different tradeoffs between how much they work in the window and how much they shift it. We show an...

On Randomization Versus Synchronization in Distributed Systems