Mario D. Tello

A Diagnostic Test for Normality Within the Power Exponential Family

This article develops the locally uniformly most powerful unbiased Lagrange multiplier test of normality of regression disturbances within the family of power exponential distributions. The small sample power properties of the test are compared in a Monte Carlo study with 6 well-known tests across 12 alternative nonnormal distributions. In addition, the finite sample power properties for nonnormal alternatives within the power exponential family are summarized by estimating response surfaces. The results suggest that the proposed text is computationally convenient and possesses relatively attractive power properties even against alternatives outside the power exponential family.

Export Product Composition Indexes in Developing Countries: The Case of Peru, 1993–2004

Liberal structural reforms associated to changes in the export product composition may affect economic growth, and at the same time, may yield biases in the official standard trade index numbers from developing countries and error measures in the real rate of economic and exports growth. This paper proposes a set of index numbers which incorporates the export product composition in a standard export index in such a way that changes in the current export value can be decomposed into: price changes; quantity changes, and product composition changes. In the applications of those indexes for the Peruvian case, it is found that the estimated overvaluations in the official annual average rate of growth of the real exports value and the GDP, were, respectively 3% and 0.6%, for the period 1993–2004.