Land constraints and agricultural intensification in Ethiopia: A village-level analysis of high-potential areas

Highland Ethiopia is one of the most densely populated regions of Africa and has long been associated with both Malthusian disasters and Boserupian agricultural intensification. This paper explores the race between these two countervailing forces, with the goal of inform two important policy questions. First, how do rural Ethiopians adapt to land constraints? And second, do land constraints significantly influence welfare outcomes in rural Ethiopia? To answer these questions we use a recent household survey of high-potential areas. We first show that farm sizes are generally very small in the Ethiopian highlands and declining over time, with young rural households facing particularly severe land constraints. We then ask whether smaller and declining farm sizes are inducing agricultural intensification, and if so, how. We find strong evidence in favor of the Boserupian hypothesis that land-constrained villages typically use significantly more purchased input costs per hectare and more family labor, and achieve higher maize and teff yields and higher gross income per hectare. However, although these higher inputs raise gross revenue, we find no substantial impact of greater land constraints on net farm income per hectare once family labor costs are accounted for. Moreover, farm sizes are strongly positively correlated with net farm income, suggesting that land constraints are an important cause of rural poverty. We conclude with some broad policy implications of our results.     

How does population density influence agricultural intensification and productivity? Evidence from Ethiopia

This study uses household-level panel data on smallholder farmers in Ethiopia to estimate how rural population density (RPD) affects agricultural intensification and productivity. Our results suggest that higher RPD is associated with smaller farm sizes, and has a positive effect on input demand, represented by increased fertilizer use per hectare. Overall, increased input use does not lead to a corresponding increase in staple crop yields, and thus farm income declines as population density increases. This suggests a situation where farmers in areas of high RPD may be stuck in place, unable to sustainably intensify in the face of rising RPD and declining farm sizes.     

How does population density influence agricultural intensification and productivity? Evidence from Malawi

This article uses nationally representative household-level panel data from Malawi to estimate how rural population density impacts agricultural intensification and household well-being. We find that areas of higher population density are associated with smaller farm sizes, lower real agricultural wage rates, and higher real maize prices. Any input intensification that occurs seems to be going to increasing maize yields, as we find no evidence that increases in population density enable farmers to increase gross value of crop output per hectare. We also find evidence that households in more densely populated areas increasingly rely on off-farm income to earn a living, but there appears to be a rural population density threshold beyond which households can no longer increase off-farm income per capita.     

Pesticide use in less developed countries — economic and environmental considerations

This paper examines the use of pesticides in the agriculture of less developed countries (LDCs). It outlines in general terms both the benefits and the costs of any pesticide programme and the difficulties involved in the quantification of cost functions are highlighted. A number of conclusions are reached at the general policy level. Selective pesticide applications can be justified in a number of cases where the benefits are clearly outstanding. However, the social costs involved in pesticide usage require careful consideration. Given the scarcity of resources and foreign exchange in LDCs, extreme caution is needed. It would appear that increased pesticide inputs have only a marginal effect on total output and employment, and other inputs (ie better seeds, irrigation schemes, etc) may yield more significant results.     

Different paths to universal access: The impact of policy and regulation on broadband diffusion in the developed and developing worlds

The authors examine the broadband digital divide by analyzing the impact of policy and regulation on broadband Internet diffusion. Their multiple regression analysis shows factors that determine broadband diffusion in technologically developed countries do not necessarily have the same impact in less developed countries. They show that in technologically developed countries, there is greater broadband diffusion in countries that make a higher financial investment in information and communication technologies (ICTs), have effective governing practices at the national level, have higher levels of education, and are more urban. In technologically developing nations, a competitive telecommunications sector and higher investment in ICTs lead to greater broadband diffusion, with investment having an even larger impact in the developing world than in the developed world. In addition, stronger democratic political institutions, higher levels of national income and lower levels of income inequality increase diffusion, but the presence of a national telecommunications regulatory authority has a negative impact. These results suggest that the path to widespread availability and use of broadband requires different strategies depending on a nation's level of technological development.     

Farmer training in off-season vegetables: Effects on income and pesticide use in Bangladesh

The cultivation of crops outside the regular cropping calendar when supply is low and prices are high can give farmers better profits and consumers more choice. However, off-season production may increase pesticide risk if crops are more affected by pests and diseases and farmers do not handle pesticides correctly. This study quantified the effect of training in off-season tomato production on the income and pesticide use of smallholder vegetable farmers in southwestern Bangladesh. The study uses farm-level data from 94 trained and 151 non-trained farm households and applies propensity score matching and inverse probability weighting to correct for selection bias. For the average smallholder vegetable farmer, training increased net household income by about 48%. We found that 31% of the trained farm households who had initially adopted the technology continued its use in the second year, but farm households who discontinued using the technology also experienced significant income gains from the training. There was a significant increase in pesticide use (+56%) and although there was an improvement in pesticide handling practices, trained farmers may have been more exposed to pesticide health risk. The policy implication is that while off-season vegetable production can create dramatic income improvements, it is important to emphasize safe and sustainable pest management methods as part of policies promoting it.     

Impact of contracts in high yielding varieties seed production on profits and yield: The case of Nepal

Nepal’s population continues to grow, but the agricultural sector’s performance remains almost stagnant. This has led to a decline in the per capita availability of food. Increasing agricultural productivity is the key to agricultural growth, and one strategy for increasing agricultural productivity is to use improved seeds. This study investigates the impact of contract farming (CF) in high yielding varieties (HYV) of paddy seed production on costs, yield, and profits of smallholder farms in Nepal. Using farm-level data and a non-parametric propensity score matching estimator, the study finds a significant positive impact of contract HYV seed farming on revenues, profits, and yield, and a significant negative impact on total costs of production. Additionally, very small farms (⩽0.43 ha) with CF in HYV paddy seeds tend to gain the most when it comes to yield per hectare. Our estimates reveal that the average smallholder household in Nepal engaged in CF with input conditions receives higher profits. However, farmers engaged in CF with output conditions tend to have higher yields but smaller profits. Finally, farmers engaged in CF in HYV paddy seeds with both input and output conditions have the highest yield gains and significantly higher profits.     

Economic impacts of mobile versus fixed broadband

Broadband telecommunication service is growing rapidly and its economic impact is likely to vary considerably around the globe. Considerable interest is being shown in wireless broadband, especially in low income and rural areas. This study focuses on the direct effect (broadband penetration as an input), and separately, the productive efficiency effect of broadband (as an information network externality), using a model developed in Thompson and Garbacz (2007). Aggregate fixed and mobile broadband usage and their effect are analyzed and compared first on a sample of forty-three countries with sufficient data. The same models are used on samples of high income and low income countries. It is hypothesized that the rapid growth of broadband could have a stronger effect for low income countries and their initial levels of network development. Key variables are adjusted to a per household basis, using information on household size. Due to the endogeneity of key variables, instrumental variables are employed to estimate separate equations for mobile broadband and fixed broadband. Predicted values for these variables are used in the final equations in order to adjust for endogeneity and omitted variable bias. The results of the model estimated for the full sample indicate that mobile broadband has an important direct effect on GDP, but fixed broadband has an effect no different than zero. In the models with high and low income samples it is apparent that low income countries derive significantly more benefit from mobile broadband. Estimates from the Stochastic Frontier Model find mobile broadband to be a significant driver of growth via a reduction of inefficiency.     

基于Kaya公式的中国CO2排放影响因素分解

基于Kaya公式的分析框架,采用对数平均Divisia因素分解法分析了能源碳排放强度、单位GDP能耗、人均收入和人口因素对我国1978—2009年CO2排放的影响。结果表明,我国人均收入的高速增长带来了CO2排放量的快速增长,人口对于CO2排放量的拉动作用稳定在一个较低水平,单位GDP能耗的持续下降对抑制CO2排放起到了持续而显著的作用,能源碳排放强度变化微弱。因此,在进一步提高能源利用效率的同时,发展新能源产业,调整现有能源结构,是我国实现低碳经济的重要途径。     

The new political economy of food and agricultural development

This paper emphasizes the benefits of an agricultural strategy of development in developing countries. It begins by analyzing the close links between food and employment in the development process. In an underdeveloped country, food production is minimal, but demand is as well because of the small population growth. After development begins, income rises and food demand outstrips production. Only at later stages of development can food production meet demand. The middle stage of development describes most developing countries, which have averaged annual growth rates of 3% per capita in 1966-80. The growth in food demand must be met through technological advance in agriculture: high-yield seeds, fertilizers, and irrigation, which, for example, helped India increase cereal yields 29% between 1954-55 and 1964-65. The rate of growth in cropped areas has declined between 1961-1980, making increased yields more necessary. Growth in employment and income leads to higher food demand, which leads to higher prices and labor costs and a tendency towards capital-intensive agriculture. As the rural sector becomes wealthier, there is also more opportunity for non-agricultural rural workers, creating still more demand. In the final development stage, agricultural products can generate foreign exchange. In Asia, the priority is to ensure efficient outcomes of capital allocations, while in Africa, technology must be instituted. Public investment has been shown to be essential to rapid development in Japan, Taiwan, and the Punjab of India. The absence of this investment in Africa, partly because of an overemphasis on urban sector investment, is largely responsible for the backward state of African agriculture. Often rural areas are overtaxed, agricultural experts are lacking, and there is a growing presence of urban bureaucrats. Both experts in the donor community and farmers themselves must become more vocal in demanding investment in the agricultural sector.     

Assessment of information and communications technology maturity level

The use of information and communications technology (ICT) turned out to be a key factor in the process of the wider development of a country. It is therefore very useful to estimate ICT evolution by the means of an appropriate metric. Based on statistical data from 159 countries, the ICT maturity level index (IMLI) is proposed and estimated by using structural equation modelling (SEM). This index is a metric measuring the information society in a country and consists of three sub-indices which are access, use and skills. It is an improvement of the ICT development index, proposed by the ITU in 2009. The analysis divides the countries into two groups, the developed and the developing, due to major disparities in their statistical data. The criterion used to define the groups was the income, as expressed by the Gross National Income per capita. The impact of a number of influential parameters on the ICT maturity level is evaluated and it becomes obvious that there is a substantial difference in their impact between developed and developing countries. Finally, a procedure that allows the ranking of the countries, based on IMLI, is presented.     

基于Gompertz曲线模型之上的中国千人汽车保有量中长期预测

本研究从整个汽车产业的角度出发,站在国家经济发展的背景下利用人均GDP和汽车保有量的Gompertz曲线模型预测了我国汽车保有量在未来几十年内的发展趋势,我们借鉴了OECD发达国家和新加坡等新兴发展中国家汽车保有量达到饱和的发展历程,在它们的经验之上并结合我国的实际情况测算我国的汽车保有量,结果显示中国的汽车保有量已经在沿着Gompertz曲线的轨迹向前发展,并且已经进入了一个高速发展时期,2001~2008年的历史数据显示,这段时间内的中国汽车千人保有量以每年3.37辆的速度在上升,在之后的预测期内,这种快速上升的趋势会一直持续下去直至2037年左右,这期间中国千人汽车保有量,快则以每年7.29辆的速度,慢则以每年2.34辆,中等以每年4.8辆的速度增长,2037年之后,中国的汽车保有量会进入饱和期,其增长速度放缓,保有量高则达到310,低则达到106,中等达到217辆的水平,对应的人均GDP分别为每年40万元,25万元和9万元(2009年价格水平)。     

Firm Responses to Income Inequality and the Cost of Time

The full cost of shopping includes the cost of the shopper's time.When that cost increases, stores have incentives to respond in waysthat economize on shopper time. One response is to substitute in-storelabor for shopper time. Pooled cross-sectional tests using data fromsuburban and city food stores show that various labor intensitymeasures are higher where the opportunity cost of shopper time ishigher. We distinguish between income and cost of time effects byshowing that store labor intensity depends on the composition ofincome between male and female members of the family, and notonly on the level of family income. We obtain similar results for twoother ways that food stores can economize on shopper time – locatingcloser to the customer and offering more check out stations withina store. We also use a unique shopping time survey to showthat shoppers from higher income households make fewer visitsto food stores, spend less time per visit in the check out line andare more likely to shop at stores with longer hours.     

Internet diffusion in sub-Saharan Africa: A cross-country analysis

In this paper, the notions of digital inequality and digital divide have been employed to describe two levels of Information and Communications Technologies (ICTs) access. On the one hand is the inequality of access to the cluster of technology measured by Internet use and on the other are the confluence of skills and other resources that differentiate countries in sub-Saharan Africa. Using cross-country data, hypotheses are tested within a simultaneous equation system. The paper confirms the vital importance of telecommunications infrastructure represented by the high correlation of telephone density with Internet irrespective of per capita income level of the country.     

‘Mainline’ telecommunications infrastructure, levels of development and economic growth: Evidence from a panel of developing countries

This paper assesses the growth impact of telecommunications infrastructure investment in developing countries by subjecting country-specific data on mainline tele-density and per capita growth to a Granger causality test within a panel cointegration framework. The results suggest that growth effects vary widely across country groupings reflecting different levels of development. Mainline tele-density and per capita growth strongly reinforce each other for countries that are relatively less developed. The reinforcement effect is even stronger for emerging countries that can be identified by their higher than average growth rates. In contrast, there is, at best, weak evidence of bi-directional causal links between the two variables for countries that are relatively more developed. These differences in the mainline tele-density and per capita growth relationships suggest that investment in telecommunications infrastructure, with its potential to generate high growth return, may serve as the critical tool for driving the growth and development process forward in the less developed countries.     

The effect of the digital economy on services exports competitiveness and ternary margins

In the era of the digital economy, improving the level of information and communications technology (ICT) development is an important measure for achieving the high-quality development of the services exports. This study constructs a comprehensive development index for the digital economy based on the United Nations Conference on Trade and Development Statistics Database (UCTADstat) to calculate the services exports competitiveness of 75 countries (regions) around the world from 2010 to 2019 and conducts ternary margin decomposition. The study empirically verifies that the digital economy promotes the competitiveness of services exports, not only driving intensive growth of quantity margin and price margin but also enhances the expansion growth of category margin. Heterogeneity analysis reveals that the effect of the digital economy on improving low- and middle-income countries' services exports competitiveness and industries with low ICT intensity is more significant than that of high-income countries and high ICT-intensity industries. The impact of the digital economy on the ternary margin of countries’ different income levels and ICT-intensity sample groups exhibits differentiated estimation results. The conclusions of this study provide novel explanations regarding the effects of the digital economy in improving services exports competitiveness and new perspectives and evidence for strategic policymaking.     

Competitive intensity and collaboration: impact on firm growth across technological environments

This article investigates the impact of competitive intensity and collaboration on firm growth across technological environments. I propose that competitive intensity determines the likelihood of firm collaboration, and that the interaction of competitive intensity and collaboration influences firm growth. These relationships are, in turn, moderated by industry‐level technological intensity. Analyzing 1,004 firms and 378 collaborations from the manufacturing sector in Singapore, I find that firms facing high or low levels of competitive intensity collaborate less often than those facing moderate levels of competitive intensity. Industry technology intensity moderates this relationship, with a stronger inverted‐U‐shaped association between competitive intensity and collaboration in more technology intensive industries. Collaboration leads to higher growth for firms facing lower levels of competitive intensity than for firms facing higher levels of competitive intensity only in more technology intensive industries. In technologically less intensive industries, collaboration leads to higher growth for firms facing higher levels of competitive intensity as compared to those facing lower levels of competitive intensity. These findings have important implications for competitive and collaborative dynamics for firm growth in different technological environments. Copyright © 2008 John Wiley & Sons, Ltd.     

Income distribution and the diffusion of networks: An empirical study of Brazilian telecommunications

Telecommunications is often considered to be an important contributor to economic growth, and most countries have therefore adopted several initiatives to improve coverage of fixed as well as mobile telephones. This paper focuses on the role of income distribution on the diffusion of fixed telecommunications in Brazil. The focus is on how the distribution of income may affect affordability and thereby the market size. The result is that an uneven income distribution may result in higher coverage for the poorest municipalities in the study since the uneven distribution allows for at least some consumers to reach the critical level of income. For municipalities above a certain average income level, the effect is reversed and coverage will be adversely affected by high inequality. The findings are robust to different measures of inequality.     

Adaptation to land constraints: Is Africa different?

Since the seminal works of Malthus and Boserup, scientists have long debated the impact of population growth and land constraints on the wellbeing of rural people. Today these concerns are particularly relevant to Africa, with its rapid population growth, very small farms, and chronic food insecurity. In this paper we examine adaptation to falling land-labor ratios using a comprehensive theoretical framework in which households faced with binding land constraints can respond in three ways: intensifying agricultural production, diversifying out of agriculture, and reducing fertility rates. Using cross-country data and drawing upon the existing literature, we reach three conclusions. First, population density is associated with reduced fallows and more intensive use of land but not fertilizer use or irrigation, indicating major challenges in achieving sustainable intensification or agricultural productivity growth. Second, there is little evidence of successful non-farm diversification in response to land pressures in Africa from domestic or international income sources. Third, rural Africans in land constrained countries desire smaller families, but have thus far benefited little from family planning policies. These findings underscore the need for a coordinated multi-sectoral approach to sustainably reduce poverty in the region.