33,440 research outputs found
THE DOUKHOBORS IN CANADA - CONFLICT AND SOCIAL CHANGE, 1900-1976
he present study will document the number of acts of violence carried out by the Doukhobors in Canada during the period 1900-1976 as well as assess the influence of two potentially important causal factors: (i) leadership style and (ii) stress and strain on the incidence of violence. While a great deal has been written on the Doukhobors, much of the material is of a âsensationalâ variety and lacks any serious analytical framework. Few researchers have tried to systematically document the actual number of conflicts engaged in by Doukhobors or relate these periodic episodes of conflict to potential causes
Ridge Fusion in Statistical Learning
We propose a penalized likelihood method to jointly estimate multiple
precision matrices for use in quadratic discriminant analysis and model based
clustering. A ridge penalty and a ridge fusion penalty are used to introduce
shrinkage and promote similarity between precision matrix estimates. Block-wise
coordinate descent is used for optimization, and validation likelihood is used
for tuning parameter selection. Our method is applied in quadratic discriminant
analysis and semi-supervised model based clustering.Comment: 24 pages and 9 tables, 3 figure
Remarks on a Paper of Leighton
Counterexamples to theorems for zeros of solutions of second order linear differential equation
School choice, competition and the efficiency of secondary schools in England
In this paper we calculate the technical efficiencies, based upon multiple outputs - school exam performance and attendance rates - of all secondary schools in England over the period 1993-97. We then estimate models to examine the determinants of efficiency in a particular year, and the determinants of the change in efficiency over the period. Our results suggest that the greater the degree of competition between schools the more efficient they are. The strength of this effect has also increased over time which is consistent with the evolution of the quasi-market in secondary education. Competition is also found to be an important determinant of the change in efficiency over time. There is, however, some evidence of conditional convergence between schools.
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