The continued development of artificial intelligence (AI) has changed production methods but may also pose challenges related to energy consumption; in addition, the effectiveness of AI differs across industries. Thus, to develop efficient policies, it is necessary to discuss the effect of AI...

My dissertation studies the dynamics of primary commodity prices empirically and theoretically. In Chapter II, I provide empirical evidence on the time series behavior of commodity price movements. Employing monthly prices for 36 individual commodities, I find that the commodity price to CPI...

This study contributes to the scarce empirical literature on dollarization by investigating the short and long-run effects of dollarization on the dynamics of prices at the macro and the micro level. This study also presents a survey of the available literature.This study examines the short-run...

Evidence that asset returns are more highly correlated during volatile markets and during market downturns (see Longin and Solnik, 2001, and Ang and Chen, 2002) has lead some researchers to propose alternative models of dependence. In this paper we develop two simple goodness-of-fit tests for...

This paper develops a wavelet (spectral) approach to test the presence of a unit root in a stochastic process. The wavelet approach is appealing, since it is based directly on the different behavior of the spectra of a unit root process and that of a short memory stationary process. By...

This paper develops a wavelet (spectral) approach to test the presence of a unit root in a stochastic process. The wavelet approach is appealing, since it is based directly on the different behavior of the spectra of a unit root process and that of a short memory stationary process. By...

In this paper, we study partial identification of the distribution of treatment effects of a binary treatment for ideal randomized experiments, ideal randomized experiments with a known value of a dependence measure, and for data satisfying the selection-on-observables assumption respectively....

In this paper, we first re-visit the inference problem for interval identified parameters originally studied in Imbens and Manski (2004) and later extended in Stoye (2008). We take the general criterion function approach and establish a new confidence interval that is asymptotically valid under...

This dissertation studies the distributions of treatment effects in switching regimes models (SRMs). First, we propose a general class of SRMs and provide simple estimators of average treatment effects. Second, we establish sharp bounds on the joint distribution of potential outcomes and the...

In this dissertation, we evaluate the efficiency of electric utilities in the United States since 1997, and determine whether investor owned electric utilities (IOUs) and cooperatives (COOPs) achieve higher cost, technical and allocative efficiency and greater financial performance than publicly...