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Post-Adoption Impacts of GM Corn on ...

Connor, Lawson Quinn.

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Post-Adoption Impacts of GM Corn on Farm Decisions in the Philippines.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Post-Adoption Impacts of GM Corn on Farm Decisions in the Philippines./
作者:	Connor, Lawson Quinn.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	183 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-04(E), Section: A.
Contained By:	Dissertation Abstracts International79-04A(E).
標題:	Economics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10708341
ISBN:	9780355458268

Post-Adoption Impacts of GM Corn on Farm Decisions in the Philippines.
Connor, Lawson Quinn.

Post-Adoption Impacts of GM Corn on Farm Decisions in the Philippines. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 183 p.

Source: Dissertation Abstracts International, Volume: 79-04(E), Section: A.

Thesis (Ph.D.)--North Carolina State University, 2017.

The impacts of GM crops in agriculture have been numerous, and the studies of these impacts have been vast as well. However, while the direct economic and agronomic benefits of these crops have been accounted for in the literature, less has been done to understand the impact that these benefits can have on decisions made by agents in these agricultural systems where adoption has taken place. In this dissertation, two specific issues are explored, the effect that adoption has on the adopting farm. The specific issue of the adoption effects on labor time allocation is investigated here. Additionally, the effect of GM corn adoption on the decisions of non-adopting farms is also explored.

ISBN: 9780355458268Subjects--Topical Terms:

517137
Economics.

Post-Adoption Impacts of GM Corn on Farm Decisions in the Philippines.
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520 $a The impacts of GM crops in agriculture have been numerous, and the studies of these impacts have been vast as well. However, while the direct economic and agronomic benefits of these crops have been accounted for in the literature, less has been done to understand the impact that these benefits can have on decisions made by agents in these agricultural systems where adoption has taken place. In this dissertation, two specific issues are explored, the effect that adoption has on the adopting farm. The specific issue of the adoption effects on labor time allocation is investigated here. Additionally, the effect of GM corn adoption on the decisions of non-adopting farms is also explored.
520 $a GM corn, particularly varieties that reduce or even eliminate pest damage, can have local (on the farm) and area-wide effects. Pesticidal effects of some GM crops reduce pest pressure, for adopting and potentially non-adopting farms as well. This can reduce associated labor needs on the adopting farm. However, pest reduction can also affect the distribution of yield, which, on its own, can induce changes to input use (including labor time) on the farm. This latter issue, if it affects labor time, produces a competing effect to the labor savings induced by adoption. The strength of this feedback mechanism from changes to the distribution likely depends on the specific changes to the distribution produced by the GM variety and the characteristics of the farmer and environment in which adoption took place. This says that the effect of adoption on farmer behavior, relating to labor decisions is likely context specific. This is an important issue since understanding the mechanisms driving changes post adoption greatly informs policy decisions related to the introduction and regulation of GM varieties. In addition, we able to identify responses to risk and mean incentives separately, having two varieties that affect either the mean or the variance but not both. This allows us to infer the relative importance of these two channels to farmers, which also informs policy makers of key incentive drivers where agricultural sector development is the primary policy goal. We find that GM crops are associated with increases in labor time at pre-harvest as well as at harvest time and that farmers in the sample used (typically poorer farmers with farm sizes less than 2 hectares on average) are more sensitive to risk than to changes in the mean.
520 $a Since the pest reducing effects can potentially spillover to neighboring farms, interactive decision mechanisms can also exist. These neighboring farms can avoid the cost of adoption themselves while still receiving the pest reduction benefits. This public good provision by adopting farms can be observed as a reduction in adoption incentive for neighboring farms. This issue is also explored and the significance of this issue is largely rooted in the welfare analysis associated with Bt crops. Findings show that welfare analysis should take into account adopting as well as non-adopting farmers since both experience impacts from Bt being planted in the area. Identification of this effect relies on an instrumental variables method introduced in Bayer and Timmins (2007) since the share of adoption in an area is endogenous with individual decisions to adopt in the non-experimental sample used here. Findings suggest that increases in area-wide adoption rates decreases individual adoption incentives in the sample used for this study. We take care to inform the reader of the institutions and conditions of farmers in the sample to enhance the ability to interpret our results.
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