City Moves: An Essay in Honour of Ian Taylor

Books reviewed in this article: Vincenzo Ruggiero, Movements in the city. Conflict in the European metropolis Sophie Body‐Gendrot, The social control of cities? A comparative perspective     

An assessment of human development,by region and country

The United Nations Development Program has introduced a composite index—the Human Development Index (HDI)—as a measure to replace GDP for assessing development of countries, using life expectancy, adult literacy, and adjusted per capita GDP as indicators. In this paper the authors suggest an alternative method for computing the index utilizing the same criteria.     

Second order multiscale stochastic volatility asymptotics: stochastic terminal layer analysis and calibration

Multiscale stochastic volatility models have been developed as an efficient way to capture the principal effects on derivative pricing and portfolio optimization of randomly varying volatility. The recent book by Fouque et al. (Multiscale Stochastic Volatility for Equity, Interest-Rate and Credit Derivatives, 2011) analyzes models in which the volatility of the underlying is driven by two diffusions – one fast mean-reverting and one slowly varying – and provides a first order approximation for European option prices and for the implied volatility surface, which is calibrated to market data. Here, we present the full second order asymptotics, which are considerably more complicated due to a terminal layer near the option expiration time. We find that to second order, the implied volatility approximation depends quadratically on log-moneyness, capturing the convexity of the implied volatility curve seen in data. We introduce a new probabilistic approach to the terminal layer analysis needed for the derivation of the second order singular perturbation term, and calibrate to S&P 500 options data.     

Improving the participation of smallholder mango farmers in modern retail channels in Indonesia

Demand for fresh fruits and vegetables in Indonesia has been continuously growing as the result of increasing incomes, high growth of the urban population, and modern retail development. The growth of modern retail chains in Indonesia in the last few decades has intrigued some development experts and practitioners because it had been expected to provide greater opportunities for linking small farmers to high value globalized market chains. The modern private sector would, it was hoped, incorporate small producers with the goal of both securing supply and contributing to poverty reduction. However, in terms of mangoes, previous studies have indicated that only a very small proportion of local production is marketed to modern retail chains and/or exported. The main objective of this study is to identify the factors affecting farmers' participation in modernizing retail channels. The study randomly selected 636 mango farmers from the two main mango production zones in Indonesia, West Java and East Java provinces. The study shows that an expansion of the modernized retail segment has not always benefitted local producers, especially smallholder farmers. It is demonstrated that smallholder farmer participation could be higher when the level of commercialization in the market is high and/or retail procurement was already more modernized. Factors that increase farmer capacity to participate in the modern retail chain are irrigation, farm tools, and infrastructure. To increase smallholder farmer participation, the study suggests a policy of encouraging enforcement of quality standards at wholesale markets, technical assistance to farmers relating to value-adding postharvest activities, and improvements in rural infrastructure.