第 13 期白眉研究者紹介● グローバル型（従来型）／ Global Type

Introduction of 13th-batch Hakubi Researchers★ 部 局 連 携 型（卓越研究員型）／ Tenure ‒Track Type● ヴ・ハ・トゥー 特定助教
Ha Thu VU (Assistant Professor)
研 究 課 題： Research Title (English): Impacts of Network-based Interventions on Farmersʼ Adoption ofAgricultural Technologies: Evidence from Field Experiments in Developing Countries
専 門 分 野： Development Economics
受 入 先 部 局： Graduate School of Economics
前職の機関名： Graduate School of Humanities and Social Sciences, Hiroshima University

Would free bed net distribution lead to a reduction of ma-leverage social networks to promote farmer’s adoption of ag-laria prevalence? What would be the impacts of providing

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investigates the impacts of network-based interventions on not

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only farmers’ uptake of new technologies but also their farmcymakers often ask themselves. As development economists,production. This research contributes to the emerging litera-ZHDQVZHUWKHTXHVWLRQVXVLQJFDXVDOLQIHUHQFHDSSURDFKHV

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In my research, I focus on sustainable rural development inwould also enable policymakers to design evidence-based

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policies that enhance farmers’ uptake of new agricultural tech-+$.8%,FRQFHQWUDWHRQDNH\VFLHQWL¿FTXHVWLRQ³+RZWR

nologies and thus improve their well-being.

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is the only study that show the long-term impacts of a tem-

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porary subsidy on crop insurance uptake. Therefore, how theSULFHVXEVLG\ZRXOGDIIHFWWKHVXEVHTXHQWDGRSWLRQRIFURS

Research project 1: Long-term Direct
and Spillover Effects of Subsidies on
Crop Insurance Adoption: Evidence
from an RCT in Vietnam

insurance remains ambiguous in the literature.

7KHPDMRULW\RIWKHSRRUOLYHLQUXUDODUHDVDQGHQJDJHLQDJ-to others in their networks in the context of crop insurance.

ricultural activities. While poor farmers are often exposed to:LWKWKHKLJKFRVWVRIUHDFKLQJDOOVPDOOIDUPHUVDFRVWH൵HF-uncertain income due to natural disasters and pests, they havetive model for agriculture extension in developing countries islimited savings to self-insure. Crop insurance is therefore

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a potential risk management strategy that improves income

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stability and prevents farmers from falling deep into poverty.

exists through social learning, subsidy provision can be pos-However, the uptake of crop insurance has been extremely

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low at market price in many developing countries.

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As with other new agricultural technologies and services,

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price subsidy is a common policy in developing countries to0\UHVHDUFKDGGUHVVHVWKHUHVHDUFKJDSVE\H[DPLQLQJWKH

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ORQJWHUPGLUHFWDQGVSLOORYHUH൵HFWVRIWKHVXEVLG\RQIDUP-sured farmers may not necessarily experience that crop insur-ers’ uptake of crop insurance. This study also explores theDQFHLVEHQH¿FLDOEHFDXVHWKH\PD\QRWUHFHLYHDQ\SD\RXWLI

impacts of crop insurance adoption on agricultural produc-

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18白眉プロジェクト 2023
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and Insurance Demand. American Economic Review 110(8),±

Research project 2: Vaccination basedon Community Animal Health Workers(CAHW): A Case Study with Cattle Vaccination in Sri Lanka.

Benyishay A. & Mobarak AM. (2019). Social Learning and)RRWDQGPRXWKGLVHDVH )0' LVDQLQIHFWLRXVGLVHDVHRQ

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livestock that remains an endemic in many Asian countries.

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below the minimum level to reach herd immunity. A shortageof vaccinators, farmers’ limited knowledge about vaccination,and difficulties in reaching animals are primary inhibitors
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9DFFLQDWLRQ EDVHG RQ &RPPXQLW\$QLPDO +HDOWK:RUNHUV&$+:V  JLYHV D SURVSHFWLYH VROXWLRQ WR WKH ORZ YDFFLQHXSWDNHE\XWLOL]LQJWKHVRFLDOQHWZRUNDPRQJORFDOIDUPHUVCAHWs are typically local farmers who are trained to promote and conduct vaccination in their villages with or without
veterinary officers. The engagement of CAHWs hypothetically raises the trust, knowledge, and convenience of local
farmers, which eventually results in an increase in the vaccine
uptake.
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of CAHWs on vaccine uptake. However, previous findings
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the motivation of community health workers compared withQRQ¿QDQFLDOVRFLDOUHZDUG
To address two research gaps mentioned above, my research
examines the CAHW-based vaccination system through two
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