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1. Call Me Educated: Evidence from a Mobile Monitoring Experiment in Niger

Author:
Christopher Ksoll and Jenny C. Aker
Publication Date:
05-2015
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
In rural areas of developing countries, education programs are often implemented through community teachers. While teachers are a crucial part of the education production function, observing their effort remains a challenge for the public sector. This paper tests whether a simple monitoring system, implemented via the mobile phone, can improve student learning as part of an adult education program. Using a randomized control trial in 160 villages in Niger, we randomly assigned villages to a mobile phone monitoring component, whereby teachers, students and the village chief were called on a weekly basis. There was no incentive component to the program. The monitoring intervention dramatically affected student performance: During the first year of the program, reading and math test scores were .15-.30 s.d. higher in monitoring villages than in nonmonitoring villages, with relatively stronger effects in the region where monitoring was weakest and for teachers for whom the outside option was lowest. We provide more speculative evidence on the mechanisms behind these effects, namely, teacher and student effort and motivation.

2. Zap It to Me: The Short-Term Impacts of a Mobile Cash Transfer Program

Author:
Rachid Boumnijel, Amanda McClelland, Niall Tierney, and Jenny C. Aker
Publication Date:
09-2011
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Conditional and unconditional cash transfers have been effective in improving development outcomes in a variety of contexts, yet the costs of these programs to program recipients and implementing agencies are rarely discussed. The introduction of mobile money transfer systems in many developing countries offers new opportunities for a more cost-effective means of implementing cash transfer programs. This paper reports on the first randomized evaluation of a cash transfer program delivered via the mobile phone. In response to a devastating drought in Niger, households in targeted villages received monthly cash transfers as part of a social protection program. One-third of targeted villages received a monthly cash transfer via a mobile money transfer system (called zap), whereas one-third received manual cash transfers and the remaining one-third received manual cash transfers plus a mobile phone. We show that the zap delivery mechanism strongly reduced the variable distribution costs for the implementing agency, as well as program recipients' costs of obtaining the cash transfer. The zap approach also resulted in additional benefits: households in zap villages used their cash transfer to purchase a more diverse set of goods, had higher diet diversity, depleted fewer assets and grew more types of crops, especially marginal cash crops grown by women. We posit that the potential mechanisms underlying these results are the lower costs and greater privacy of the receiving the cash transfer via the zap mechanism, as well as changes in intra-household decision-making. This suggests that m-transfers could be a cost-effective means of providing cash transfers for remote rural populations, especially those with limited road and financial infrastructure. However, research on the broader welfare effects in the short- and long-term is still needed
Topic:
Agriculture, Development, and Science and Technology
Political Geography:
Africa

3. Dial "A" for Agriculture: A Review of Information and Communication Technologies for Agricultural Extension in Developing Countries

Author:
Jenny C. Aker
Publication Date:
09-2011
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Agriculture can serve as an important engine for economic growth in developing countries, yet yields in these countries have lagged far behind those in developed countries for decades. One potential mechanism for increasing yields is the use of improved agricultural technologies, such as fertilizers, seeds and cropping techniques. Public-sector programs have attempted to overcome information-related barriers to technological adoption by providing agricultural extension services. While such programs have been widely criticized for their limited scale, sustainability and impact, the rapid spread of mobile phone coverage in developing countries provides a unique opportunity to facilitate technological adoption via information and communication technology (ICT)-based extension programs. This article outlines the potential mechanisms through which ICT could facilitate agricultural adoption and the provision of extension services in developing countries. It then reviews existing programs using ICT for agriculture, categorized by the mechanism (voice, text, internet and mobile money transfers) and the type of services provided. Finally, we identify potential constraints to such programs in terms of design and implementation, and conclude with some recommendations for implementing field-based research on the impact of these programs on farmers' knowledge, technological adoption and welfare.
Topic:
Agriculture, Development, Poverty, Science and Technology, Foreign Aid, and Foreign Direct Investment

4. West African Experience with the World Rice Crisis, 2007–2008

Author:
Vijaya Ramachandran, Peter Timmer, Steven Block, and Jenny C. Aker
Publication Date:
02-2011
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Rice production in Africa has tended to be low-yielding, geographically dispersed, and uncompetitive against low-cost Asian imports, even when protected by high freight costs and substantial trade barriers. Skyrocketing prices in world markets in 2007—08 were a shock to African consumers, producers, and governments alike. When international rice prices were relatively low, rice imports did not pose economic or political problems for West African governments. Extremely expensive imports reverse that equation. This paper addresses the response to that reversal first by presenting a historical review of trends in the West African rice sector and, second, by assessing the effect of world rice prices on domestic prices, primarily at the consumer level.
Topic:
Humanitarian Aid and Food
Political Geography:
Africa and Asia

5. Are Borders Barriers? The Impact of International and Internal Ethnic Borders on Agricultural Markets in West Africa

Author:
Jenny C. Aker, Michael W. Klein, Stephen A. O'Connell, and Muzhe Yang
Publication Date:
04-2010
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
This paper addresses two important economic issues for Africa: the contribution of national borders and ethnicity to market segmentation and integration between and within countries. Market pair regression analysis provides evidence of higher conditional price dispersion for both a grain and a cash crop between markets separated by the Niger-Nigeria border than between two markets located in the same country. A regression discontinuity analysis also confirms a significant price change at the international border. The international border effect is lower, however, if the cross-border markets share a common ethnicity. Ethnicity is also linked to higher price dispersion within Niger; we find a significant intranational border effect between markets in different ethnic regions of the country. This suggests that ethnic similarities diminishing international border effects could enhance international market integration, and ethnic differences could contribute to intranational market segmentation in sub-Saharan Africa. We provide suggestive evidence that the primary mechanism behind the internal border effect is related to the role of ethnicity in facilitating access to credit in agricultural markets. We argue that the results are not driven by differences in price volatility or observables across borders.
Topic:
Agriculture, Economics, Ethnic Conflict, and Markets
Political Geography:
Africa, West Africa, and Nigeria

6. Mobile Phones and Economic Development in Africa

Author:
Jenny C. Aker and Isaac M. Mbiti
Publication Date:
06-2010
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
We examine the growth of mobile phone technology over the past decade and consider its potential impacts upon quality of life in low-income countries, with a particular focus on sub-Saharan Africa. We first provide an overview of the patterns and determinants of mobile phone coverage in sub-Saharan Africa before describing the characteristics of primary and secondary mobile phone adopters on the continent. We then discuss the channels through which mobile phone technology can impact development outcomes, both as a positive externality of the communication sector and as part of mobile phone-based development projects, and analyze existing evidence. While current research suggests that mobile phone coverage and adoption have had positive impacts on agricultural and labor market efficiency and welfare in certain countries, empirical evidence is still somewhat limited. In addition, mobile phone technology cannot serve as the “silver bullet” for development in sub-Saharan Africa. Careful impact evaluations of mobile phone development projects are required to better understand their impacts upon economic and social outcomes, and mobile phone technology must work in partnership with other public good provision and investment.
Topic:
Economics
Political Geography:
Africa

7. Does Digital Divide or Provide? The Impact of Cell Phones on Grain Markets in Niger

Author:
Jenny C. Aker
Publication Date:
10-2008
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Due partly to costly information, price dispersion across markets is common in developed and developing countries. Between 2001 and 2006, cell phone service was phased in throughout Niger, providing an alternative and cheaper search technology to grain traders and other market actors. Weconstruct a novel theoretical model of sequential search, in which traders engage in optimal search for the maximum sales price, net transport costs. The model predicts that cell phones will increase traders' reservation sales prices and the number of markets over which they search, leading to a reduction in price dispersion across markets. To test the predictions of the theoretical model, we use a unique market and trader dataset from Niger that combines data on prices, transport costs, rainfall and grain production with cell phone access and trader behavior. We first exploit the quasi-experimental nature of cell phone coverage to estimate the impact of the introduction of information technology on market performance. The results provide evidence that cell phones reduce grain price dispersion across markets by a minimum of 6.4 percent and reduce intra-annual price variation by 12 percent. Cell phones have a greater impact on price dispersion for market pairs that are farther away, and for those with lower road quality. This effect becomes larger as a higher percentage of markets have cell phone coverage. We provide empirical evidence in support of specific mechanisms that partially explain the impact of cell phones on market performance. Robustness checks suggest that the results are not driven by selection on unobservables, nor are they solely a result of general equilibrium effects. Calculations of the four-firm concentration index suggest that the grain market structure is competitive, so the observed reductions in price dispersion are not due to greater market collusion. The primary mechanism by which cell phones affect market-level outcomes appears to be a reduction in search costs, as grain traders operating in markets with cell phone coverage search over a greater number of markets and sell in more markets. The results suggest that cell phones improved consumer and trader welfare in Niger.
Topic:
Agriculture, International Trade and Finance, Markets, and Science and Technology
Political Geography:
Africa and Nigeria

8. Rainfall Shocks, Markets, and Food Crises: Evidence from the Sahel

Author:
Jenny C. Aker
Publication Date:
12-2008
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
How do markets respond to extreme rainfall in West Africa? This paper examines the effect of weather on grain market performance in Niger, a country increasingly affected by drought and severe food crises over the past two decades. Using a dataset that combines information on rainfall, agricultural production, prices and transaction costs, I exploit rainfall variation to estimate the impact of drought on grain market performance between 1997 and 2006. Time series tests suggest that grain markets in Niger respond to supply shocks and that markets are more integrated during drought years. Exploiting the exogeneity of extreme rainfall in a difference-in-differences framework supports these findings: drought reduces grain price dispersion across markets. This impact is stronger as a higher percentage of markets are affected by drought, as was the case in 2004/2005, the year of a severe food crisis. The results suggest that early warning systems in West Africa should focus on the spatial impact of drought at the sub-regional level, as well as monitor prices in key forecasting markets during the harvest period.
Topic:
Agriculture, International Political Economy, and Markets
Political Geography:
Africa and Nigeria