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Full-Text Articles in Physical Sciences and Mathematics
On Optimizing Multi-Level Designs: Power Under Budget Constraints, Todd C. Headrick, Bruno D. Zumbo
On Optimizing Multi-Level Designs: Power Under Budget Constraints, Todd C. Headrick, Bruno D. Zumbo
Todd Christopher Headrick
This paper derives a procedure for efficiently allocating the number of units in multi-level designs given prespecified power levels. The derivation of the procedure is based on a constrained optimization problem that maximizes a general form of a ratio of expected mean squares subject to a budget constraint. The procedure makes use of variance component estimates to optimize designs during the budget formulating stages. The method provides more general closed form solutions than other currently available formulae. As such, the proposed procedure allows for the determination of the optimal numbers of units for studies that involve more complex designs. A …
More Powerful Unconditional Tests Of No Treatment Effect From Binary Matched Pairs, Chris Lloyd
More Powerful Unconditional Tests Of No Treatment Effect From Binary Matched Pairs, Chris Lloyd
Chris J. Lloyd
This is the workign paper version that preceeded the paper "A New Exact and More Powerful Unconditional Test of no Treatment Effect from Binary Matched Pairs" published in Biometrics 76 (also on this site:http://works.bepress.com/chris_lloyd/3/
Identifying A Source Of Financial Volatility, Douglas G. Steigerwald, Richard Vagnoni
Identifying A Source Of Financial Volatility, Douglas G. Steigerwald, Richard Vagnoni
Douglas G. Steigerwald
How should one combine stock and option markets in models of trade and asset price volatility? We address this question, paying particular attention to the identification of parameters of interest.