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Titolo:
Are crop yields normally distributed?
Autore:
Just, RE; Weninger, Q;
Indirizzi:
Univ Maryland, Dept Agr & Resource Econ, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 urce Econ, College Pk, MD 20742 USA Utah State Univ, Dept Econ, Logan, UT 84322 USA Utah State Univ Logan UT USA 84322 e Univ, Dept Econ, Logan, UT 84322 USA
Titolo Testata:
AMERICAN JOURNAL OF AGRICULTURAL ECONOMICS
fascicolo: 2, volume: 81, anno: 1999,
pagine: 287 - 304
SICI:
0002-9092(199905)81:2<287:ACYND>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONNORMAL ERRORS; TIME-SERIES; TESTS; REGRESSION; INSURANCE; DEMAND; PRICE; RISK;
Keywords:
crop yields; normality; statistical testing;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Social & Behavioral Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Just, RE Univ Maryland, Dept Agr & Resource Econ, College Pk, MD 20742 USAUniv Maryland College Pk MD USA 20742 , College Pk, MD 20742 USA
Citazione:
R.E. Just e Q. Weninger, "Are crop yields normally distributed?", AM J AGR EC, 81(2), 1999, pp. 287-304

Abstract

The evidence for nonnormality of crop yields is reassessed. Three methodological problems are identified in typical yield distribution analyses: (i) misspecification of the nonrandom components of yield distributions, (ii) missreporting of statistical significance, and (iii) use of aggregate time-series (ATS) data to represent farm-level yield distributions. One or more of these problems infect virtually all evidence against normality to date. The positive contribution of the article is a set of principles that must befollowed in any valid investigation of yield normality.

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Documento generato il 18/09/20 alle ore 16:08:38