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Filling a Niche? The Maize Productivity Impacts of Adaptive Breeding by a Local Seed Company in Kenya

Bird, Samuel S. - 2020

This paper explores the idea that a competitive seed system may systematically underserve farmers in small, agro-ecological niches, leaving potential yield gains on the table and farmers in these areas less productive and poorer than they need be. We develop a simple theoretical model that...

Persistent link: https://www.econbiz.de/10012481184

Environmental Drivers of Agricultural Productivity Growth : CO2 Fertilization of US Field Crops

Taylor, Charles A.; Schlenker, Wolfram - National Bureau of Economic Research - 2021

> equates to a 0.5%, 0.6%, and 0.8% yield increase for corn, soybeans, and wheat, respectively. Viewed retrospectively, 10%, 30 …

Persistent link: https://www.econbiz.de/10012659998

Adaptation to Environmental Change : Agriculture and the Unexpected Incidence of the Acid Rain Program

Sanders, Nicholas J.; Barreca, Alan I. - National Bureau of Economic Research - 2021

airborne sulfate levels and yields for corn and soybean. We estimate crop revenue losses for these two crops around $1 …

Persistent link: https://www.econbiz.de/10012496145

Weather, Climate, and Technology Adoption : An Application to Drought-Tolerant Corn in the United States

McFadden, Jonathan R.; Smith, David; Wallander, Steven - National Bureau of Economic Research - 2022

how recent drought exposure, drought risk, and other climatic features have influenced adoption of DT corn--a water … risk--rather than short-run drought exposure in recent prior years--led to increased adoption of DT corn varieties in 2016 …. Farmers are more likely to plant DT corn on highly erodible land and less likely to irrigate such varieties, consistent with …

Persistent link: https://www.econbiz.de/10013334340

Machine Forecast Disagreement

Bali, Turan G.; Kelly, Bryan T.; Mörke, Mathis; … - National Bureau of Economic Research - 2023

We propose a statistical model of differences in beliefs in which heterogeneous investors are represented as different machine learning model specifications. Each investor forms return forecasts from their own specific model using data inputs that are available to all investors. We measure...

Persistent link: https://www.econbiz.de/10014337816

Complexity in Factor Pricing Models

Didisheim, Antoine; Ke, Shikun; Kelly, Bryan T.; … - National Bureau of Economic Research - 2023

We theoretically characterize the behavior of machine learning asset pricing models. We prove that expected out-of-sample model performance--in terms of SDF Sharpe ratio and test asset pricing errors--is improving in model parameterization (or "complexity"). Our empirical findings verify the...

Persistent link: https://www.econbiz.de/10014372446

Analyzing Bounded Count Data

Mullahy, John - National Bureau of Economic Research - 2023

outcomes are of interest, and on econometric modeling of their probability and moment structures. Hopefully the paper will …

Persistent link: https://www.econbiz.de/10014421240

How Often Are Propositions on the Effects of Customs Unions Theoretical Curiosa and When Should They Guide Policy?

Abrego, Lisandro - 2001

This paper uses computational techniques to assess whether or not various propositions that have been advanced as plausible in the literature on Customs Unions (or other regional trade agreements) may actually hold. The idea is to make probabilistic statements as to whether propositions of...

Persistent link: https://www.econbiz.de/10012470420

How Reasonable Are Assumptions Used in Theoretical Models? : Computational Evidence on the Likelihood of Trade Pattern Changes

Abrego, Lisandro - 2001

This paper seeks to contribute to discussion of the reasonableness of sometimes seemingly innocent assumptions used in theoretical trade models that the direction of trade is both predetermined for each good for each country and fixed. Here, we provide computational evidence as to the...

Persistent link: https://www.econbiz.de/10012470557

Evaluating the Specification Errors of Asset Pricing Models

Hodrick, Robert J. - 2000

This paper examines the specification errors of several asset pricing models using the methodology of Hansen and Jagannathan (1997) and a common data set. The models are the CAPM, the Consumption CAPM, the Jagannathan and Wang (1996) conditional CAPM, the Campbell (1996) dynamic asset pricing...

Persistent link: https://www.econbiz.de/10012471106