We introduce simple nonparametric density estimators that generalize the classical histogram and frequency polygon. The new estimators are expressed as linear combination of density functions that are piecewise polynomials, where the coe cients are optimally chosen in order to minimize the integrated square error of the estimator. We establish the asymptotic behaviour of the proposed estimators...

This paper proposes a new unit root test in the context of a random autoregressive coefficient panel data model, in which the null of a unit root corresponds to the joint restriction that the autoregressive coefficient has unit mean and zero variance. The asymptotic distribution of the test statistic is derived and simulation results are provided to suggest that it performs very well in small s...

A Simple Method to Visualize Results in Nonlinear Regression Models A simple graphical approach to presenting results from nonlinear regression models is described. In the face of multiple covariates, ‘partial mean’ plots may be unattractive. The approach here is portable to a variety of settings and can be tailored to the specific application at hand. A simple four variable nonparametric regre...

abstract: decentralization is a process in which local affairs are administrated by local authorities outside of activities of the central government. today, decentralization policy is considered as one of the ways that most countries adopted to improve public sector performance. in this paper using geometric analysis, innovation that this paper represents, an econometric model is considered to...

This study examines asymmetric and the lag effects of oil price, gas exchange rate on stock performance Malaysian sub-industries. Using company-level data multi factor asset pricing models, this found that rate, common systematic risk factors such as market, size, book-to-market have significant sub-industries, but these exposures remain heterogeneous. Oil price show strong asymmetrical impacts...

En este estudio se verifica en qué medida las muertes y la oferta laboral inciden generación de capital humano el depar-tamento Bolívar durante periodo 2002 – 2009, para lo cual empleó información recolectada por DANE Ministerio Educación Nacional. Inicialmente realiza caracterización análisis variables luego desarrolla un ejercicio eco-nométrico utilizando método efectos fijos con corrección h...

This paper proposes an improved procedure for stochastic volatility model estimation with an application in risk management. This procedure is composed of the following instrumental components: Fourier transform method for volatility estimation with a price correction scheme, and importance sampling for extremal event probability estimation with applications to estimate Value-at-Risk and condit...

We estimate the effect of motherhood on wages using matching. We distinguish between net and direct effects. The net effect includes the total wage costs, whereas the direct represents the causal effect. Since covariates are likely affected by motherhood, the latter effect is not immediately uncovered. We therefore implement two strategies: First, we confine the analysis to consider sector-spec...