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A Personal Touch: Text Messaging for Loan Repayment AgEcon
Morten, Melanie; Karlan, Dean S.; Zinman, Jonathan.
We worked with two microlenders to test impacts of randomly assigned reminders for loan repayments in the “text messaging capital of the world”. We do not find strong evidence that loss versus gain framing or messaging timing matter. Messages only robustly improve repayment when they include the loan officer’s name. This effect holds for clients serviced by the loan officer previously but not for first-time borrowers. Taken together, the results highlight the potential and limits of communications technology for mitigating moral hazard, and suggest that personal obligation/reciprocity between borrowers and bank employees can be harnessed to help overcome market failures.
Tipo: Working Paper Palavras-chave: Microcredit; Microfinance; Randomized evaluation; Development finance; Consumer/Household Economics; Financial Economics; Research and Development/Tech Change/Emerging Technologies; D21; D92; G21; O16; O17.
Ano: 2012 URL: http://purl.umn.edu/121867
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A Política de Preços Mínimos: Benefícios para Quem, e a que Custo? AgEcon
SIMA, Technical Team.
Resultados das investigações do Projecto de Segurança Alimentar em Moçambique MAP-Direcção de Economia-Dpto. Estatística
Tipo: Report Palavras-chave: Food security; Food policy; Mozambique; Research and Development/Tech Change/Emerging Technologies; Q18.
Ano: 1996 URL: http://purl.umn.edu/55194
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A Politico-Economic Model of Aging, Technology Adoption and Growth AgEcon
Lancia, Francesco; Prarolo, Giovanni.
Over the past century, all OECD countries have been characterized by a dramatic increase in economic conditions, life expectancy and educational attainment. This paper provides a positive theory that explains how an economy might evolve when the longevity of its citizens both influences and is influenced by the process of economic development. We propose a three periods OLG model where agents, during their lifetime, cover different economic roles characterized by different incentive schemes and time horizon. Agents’ decisions embrace two dimensions: the private choice about education and the public one upon innovation policy. The theory focuses on the crucial role played by heterogeneous interests in determining innovation policies, which are one of the...
Tipo: Working or Discussion Paper Palavras-chave: Growth; Life Expectancy; Human Capital; Systemic Innovation; Majority Voting; International Development; Research and Development/Tech Change/Emerging Technologies; D70; J10; O14; O31; O43.
Ano: 2007 URL: http://purl.umn.edu/9552
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A precíziós gazdálkodás terjedésének vizsgálata AgEcon
Kalmar, Sandor.
A precíziós gazdálkodás – 90-es évek közepétől kezdődő – alkalmazását követően napjainkban is megválaszolásra vár a beruházás megtérülési idejének és a területnagyságnak az összefüggése. Megállapítható, hogy a beruházás az eszközök gyors avulását figyelembe véve, 3 éves megtérülés esetén, 3 millió Ft (áfával együtt) értékű eszközberuházás, 21 140 Ft/ha inputfelhasználás és 5%-os megtakarítási szint mellett 946 ha-on térülhet meg az inputanyag-megtakarításból. Természetesen több végeredmény is lehetséges a változók függvényében. -------------------------------------- Ever since precision farming was introduced in the mid-nineties, correlations between payback period and area size have been unexplored. It was found that – taking into account the quick...
Tipo: Journal Article Palavras-chave: Precíziós gazdálkodás; Innováció terjedése; Ökonómiai modell; Precision farming; Spreading of innovation; Economic model; Crop Production/Industries; Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009 URL: http://purl.umn.edu/92531
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A PRIMAL-DUAL ESTIMATOR OF PRODUCTION AND COST FUNCTIONS WITHIN AN ERRORS-IN-VARIABLES CONTEXT AgEcon
Paris, Quirino; Caputo, Michael R..
In 1944, Marschak and Andrews published a seminal paper on how to obtain consistent estimates of a production technology. The original formulation of the econometric model regarded the joint estimation of the production function together with the first-order necessary conditions for profit-maximizing behavior. In the seventies, with the advent of econometric duality, the preference seemed to have shifted to a dual approach. Recently, however, Mundlak resurrected the primal-versus-dual debate with a provocative paper titled “Production Function Estimation: Reviving the Primal.” In that paper, the author asserts that the dual estimator, unlike the primal approach, is not efficient because it fails to utilize all the available information. In this paper we...
Tipo: Working or Discussion Paper Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2004 URL: http://purl.umn.edu/11975
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A primer on implementing compressed simulated annealing for the optimisation of a constrained simulation model in Microsoft Excel AgEcon
Doole, Graeme J..
This short paper provides a simple introduction on how a simulation model implemented in Microsoft Excel® can be optimised using Visual Basic for Applications (VBA) programming and the compressed simulated annealing algorithm (Ohlmann et al., 2004; Ohlmann and Thomas, 2007). The standard simulated annealing procedure enters as a special case. Practical advice for determining the parameters that guide the stochastic search process in an annealing algorithm is also given.
Tipo: Working or Discussion Paper Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2007 URL: http://purl.umn.edu/7420
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A Profit in Our Own Country: Record of a seminar conducted by the Crawford Fund for International Agricultural Research, Parliament House, Canberra, May 17 1994 AgEcon
Tipo: Technical Report Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1994 URL: http://purl.umn.edu/118450
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A proposal for measuring the benefits of policy-oriented social science research AgEcon
Park, Donghyun.
This paper addresses the problem of how to measure the benefits of policy-oriented social science research. It argues that social science research promotes economic efficiency in three different ways—it fosters efficiency in the public sector both directly and through effects on the general public, and it increases the efficiency of the private sector. The paper also proposes a practical empirical methodology for measuring the benefits of policy-oriented social science research. The proposed methodology includes a three-stage analysis of a cross-section of countries. The relationship between research and policy is estimated first. Then an estimate is made of the relationship between policy and economic growth. Finally, these estimates are used to deduce...
Tipo: Working or Discussion Paper Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1998 URL: http://purl.umn.edu/48292
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A Proposed Expert System for the Management of Lucerne - LATIS AgEcon
Bishop, A.L.; Lodge, G.M.; Waterhouse, D.B..
Tipo: Journal Article Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1987 URL: http://purl.umn.edu/12349
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A PROSPECTIVE ANALYSIS OF THE POTENTIAL EFFECT OF BIO-ENGINEERED GRAINS ON COMMODITY MARKETING SYSTEMS AgEcon
Sonka, Steven T.; Schroeder, R. Christopher; Cunningham, Carrie J..
The goal of the analyses described in this paper is to explore market system changes that could result from adoption of bioengineered crops, if that adoption occurs. The analysis results reported are prospective in nature with the overall purpose of identifying questions and key issues, rather than predict specific outcomes.
Tipo: Conference Paper or Presentation Palavras-chave: Marketing; Research and Development/Tech Change/Emerging Technologies.
Ano: 2001 URL: http://purl.umn.edu/20463
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A PROSPECTUS FOR RESEARCH ON THE AGRICULTURAL POTENTIAL OF THE SOUTH AgEcon
Purcell, Joseph C..
Tipo: Journal Article Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1976 URL: http://purl.umn.edu/29942
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A PROTOCOL OR A SET OF STANDARDS TO GUIDE AGRICULTURAL ECONOMICS RESEARCH AgEcon
Debertin, David L.; Luzar, E. Jane; Chambers, Orlando D..
This article examines some difficult decisions that agricultural economists must confront in doing research. Over many years, rules and standards have developed in agricultural economics that guide researchers, providing an underlying framework for research methods. This article deals with applying these seldom discussed guidelines to specific research situations confronted by agricultural economists. With this article, we hope to stimulate a dialogue among agricultural economists about the need for additional, appropriate methodological guidelines in agricultural economics research.
Tipo: Journal Article Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1995 URL: http://purl.umn.edu/30934
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A Response to the Forecast of Doom AgEcon
Nuthall, Peter L..
Tipo: Journal Article Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1982 URL: http://purl.umn.edu/12526
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A Return of the Threshing Ring? A Case Study of Machinery and Labor-Sharing in Midwestern Farms AgEcon
Artz, Georgeanne M.; Colson, Gregory; Ginder, Roger G..
Machinery-sharing provides an alternative for smaller producers to obtain the efficiencies of large farming operations and remain competitive in an increasingly concentrated agricultural industry. This research uses a multiple case study design to examine the motivations for sharing equipment and labor among farms and to better understand how group members handle the transaction costs of sharing. Our case evidence finds that in addition to cost savings, access to reliable labor is an important motivation for participating in a sharing arrangement. Trust and frequent communication among group members helps to minimize the transaction costs incurred from sharing.
Tipo: Journal Article Palavras-chave: Machinery sharing; Transaction costs; Farm-level cooperation; Agribusiness; Agricultural Finance; Community/Rural/Urban Development; Crop Production/Industries; Farm Management; Financial Economics; Labor and Human Capital; Land Economics/Use; Production Economics; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Q12; Q13.
Ano: 2010 URL: http://purl.umn.edu/100515
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A Review of Food Research in Vietnam, with Emphasis on Postharvest Losses AgEcon
Lam, My-Yen.
Tipo: Report Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1993 URL: http://purl.umn.edu/113896
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A REVIEW OF THREE RESEARCH PROGRAMS IN QUANTITATIVE MODELLING IN THE BUREAU OF AGRICULTURAL ECONOMICS AgEcon
Kingma, Onko Tjerek; Longmire, James L.; Stoeckel, Andrew B..
Elements of three of the BAE's research programs in economic modelling of the rural sector, namely, the modelling of agricultural production systems, rural commodity markets and agriculture within a general equilibrium framework, are reviewed with emphasis on the use of such models in policy work. Suggestions are made for further modelling in these areas.
Tipo: Journal Article Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 1980 URL: http://purl.umn.edu/22915
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A Semi-Parametric Analysis of Technology, with an Application to U.S. Dairy Farms AgEcon
de los Campos, Gustavos; Foltz, Jeremy D.; Chavas, Jean-Paul; Gianola, Daniel.
This article proposes a semi-parametric stochastic frontier model (SPSF) in which components of the technology and of technical efficiency are represented using semi-parametric methods and estimated in a Bayesian framework. The approach is illustrated in an application to US farm data. The analysis shows important scale economies for small and medium herds and constant return to scale for larger herds. With the exception of labor, estimates of marginal products were close to the value expected under profit maximization. Finally, the results suggest important opportunities to increase productivity through reductions in technical inefficiencies.
Tipo: Working or Discussion Paper Palavras-chave: Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2010 URL: http://purl.umn.edu/92251
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A SIMPLE MODEL OF VOLUNTARY VS MANDATORY LABELLING OF GMOS AgEcon
Kirchhoff, Stefanie; Zago, Angelo M..
We consider the welfare impact of the mandatory and voluntary labelling to inform consumers on GMOs content in foods. With a model of vertical differentiation in competitive markets, we evaluate the effects on price equilibrium and welfare levels. We find that the mandatory labelling scheme would be optimal in those countries with more GMO-averse consumers and no-GMOs practices producers. Voluntary labelling would instead optimally be chosen in those countries where producers are using GMOs and consumers are more concerned about the costs savings resulting in this technology adoption.
Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2001 URL: http://purl.umn.edu/20540
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A spatial bio-economic modelling approach on the trade-offs between global bioenergy demand, agricultural intensification, expansion, and trade AgEcon
Lotze-Campen, Hermann; Popp, Alexander; Beringer, Tim; Muller, Christoph; Lucht, Wolfgang.
Increased future demands for food, fibre and fuels from biomass can only be met if the available land and water resources on a global scale are used and managed as efficiently as possible. The main routes for making the global agricultural system more productive are through intensification and technological change on currently used agricultural land, land expansion into currently non-agricultural areas, and international trade in agricultural commodities and processed goods. In order to analyse the trade-offs and synergies between these options, we present a global bio-economic modelling approach with a special focus on spatially explicit land and water constraints as well as technological change in agricultural production. For a given bioenergy demand...
Tipo: Conference Paper or Presentation Palavras-chave: Land use change; Spatial modelling; Technological change; Environmental Economics and Policy; International Development; International Relations/Trade; Land Economics/Use; Research and Development/Tech Change/Emerging Technologies; C61; F15; Q24; Q25.
Ano: 2009 URL: http://purl.umn.edu/51458
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A Stochastic-Dynamic Model of Costly Reversible Technology Adoption AgEcon
Baerenklau, Kenneth A.; Knapp, Keith C..
We develop a stochastic-dynamic model of technology adoption that imposes fewer restrictions on behavior than do previous studies of similar decision problems. Like these previous studies, our model is forward-looking and can be used to demonstrate the additional "hurdle rate" that must be met before adoption will take place when the future state of the world is uncertain. Unlike these previous studies, our approach does not impose the untenable assumptions that investment in a new technology is irreversible or that technologies have unlimited useful lifetimes. Rather, we address the more reasonable situation of costly reversibility and limited lifetimes. Our solution method utilizes Bellman's equation and standard dynamic programming techniques....
Tipo: Conference Paper or Presentation Palavras-chave: Dynamic optimization; Irrigation; Reversible; Technology adoption; Water; Research and Development/Tech Change/Emerging Technologies.
Ano: 2005 URL: http://purl.umn.edu/19156
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