Abstract
We use a large, rich dataset compiled from results of university extension trials to estimate the contribution of genetic modification (GM) to changes in corn yield in the United States from timeA to timeB. Through repeated experimental trials, we obtain consistent estimates of the effect of these traits by using both the Hausman‐Taylor estimator and a comparison of fixed effects estimates analogous to the agronomic practice of comparing near‐isolines. Our results suggest that GM traits had a positive impact on yield, but that gains associated with combining several GM traits in one hybrid are not necessarily additive.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 2
Claim · model-written summary
GM traits had a positive effect on corn yield.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- GM traitse0
- Outcome
- yielde0
- Direction
- positive impacte0
- Setting
- United Statest0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our results suggest that GM traits had a positive impact on yield”
t0“Corn Yield in the United States”
Claim · model-written summary
Yield gains from combining multiple GM traits in one hybrid were not necessarily additive.
- Treatment
- combining several GM traits in one hybride0
- Outcome
- gainse0
- Direction
- not necessarily additivee0
Not reportedTaxon
Verbatim
e0“gains associated with combining several GM traits in one hybrid are not necessarily additive.”
The same questions in other papers
transgenic · yield · Zea mays (maize)Positive and negative results
50 papers in the same direction as this paper · 17 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- positive
65 papers more in this group
See all 69 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.