Showing 1 - 10 of 134
Irrigation in the Eastern US receives little attention compared to the West, but farmers in humid states of the US, traditionally reliant on rainfall, have more than tripled irrigation since 1978. We examine this trend in Illinois where there has been a nearly threefold increase in center pivot...
Persistent link: https://www.econbiz.de/10013210121
We design and experimentally evaluate two low-cost, scalable interventions - an online preparatory module and a text-message coaching program - in a sample of over 3,000 undergraduate students at a large Canadian university. Supplementing administrative data on academic outcomes with a unique...
Persistent link: https://www.econbiz.de/10012480645
An emerging literature documents the many challenges faced by college students during the COVID-19 pandemic. Little is known, however, about how students responded to the adversity. Focusing on two large Canadian universities, we provide some of the first evidence on the coping strategies...
Persistent link: https://www.econbiz.de/10012533352
This paper examines monetary policy in Rudebusch and Svensson's (1999) two equation macroeconomic model when the policymaker recognizes that the model is an approximation and is uncertain about the quality of that approximation. It is argued that the minimax approach of robust control provides a...
Persistent link: https://www.econbiz.de/10012471286
This paper describes the results of a Monte Carlo study of certain aspects of robust regression confidence region estimation for linear models with one, five, and seven parameters. One-step sine estimators (c = l.42) were used with design matrices consisting of short-tailed, Gaussian, and...
Persistent link: https://www.econbiz.de/10012479015
The estimator holding the central place in the theory of the multivariate "errors-in-the-variables" (EV) model results from performing orthogonal recession on variables rescaled according to the covariance matrix of the errors [7]. Our first principal finding, via Monte Carlo on the univariate...
Persistent link: https://www.econbiz.de/10012479043
What are the statistical and computational problems associated with robust nonlinear regression? This paper presents a number of possible approaches to these problems and develops a particular algorithm based on the work of Powell and Dennis
Persistent link: https://www.econbiz.de/10012479050
Four estimators of econometric models are compared for predictive accuracy. Two estimators assume that the parameters of the equations are subject to variation over time. The first of these, the adaptive regression technique (ADR), assumes that the intercept varies overtime, while the other, a...
Persistent link: https://www.econbiz.de/10012479070
Recent work on robust estimation has led to many procedures, which are easy to formulate and straightforward to program but difficult to study analytically. In such circumstances experimental sampling is quite attractive, but the variety and complexity of both estimators and sampling situations...
Persistent link: https://www.econbiz.de/10012479109
The prediction accuracy of six estimators of econometric models are compared. Two of rthe estimators are ordinary least squares (OLS) and full-information maximum likelihood. (FML). The other four estimators are robust estimators in the sense that they give less weight to large residuals. One of...
Persistent link: https://www.econbiz.de/10012479110