This paper estimates the agglomeration benefits that arise from vertical linkages between firms in the context of Indonesia. The analysis is based on international trade and economic geography theory developed by Krugman and Venables (1995). We identify the agglomeration benefits off the spatial variation in firm level nominal wages. Unusually detailed intermediate input data allow us to more accurately capture spatial input/output linkages than in previous studies. We take account of the location of input suppliers to estimate cost linkages; and the location of demand from final consumers and other firms to estimate demand linkages. The results show that the externalities that arise from demand and cost linkages are quantitatively important and highly localized. An understanding of the extent and strength of spatial linkages is crucial in shaping policies that seek to influence regional development.

Abstract We examine the impact of criminalizing sex work, exploiting an event in which local officials unexpectedly criminalized sex work in one district in East Java, Indonesia, but not in neighboring districts. We collect data from female sex workers and their clients before and after the change. We find that criminalization increases sexually transmitted infections among female sex workers by 58 percent, measured by biological tests. This is driven by decreased condom access and use. We also find evidence that criminalization decreases earnings among women who left sex work due to criminalization and decreases their ability to meet their children’s school expenses while increasing the likelihood that children begin working to supplement household income. Although criminalization has the potential to improve population STI outcomes if the market shrinks permanently, we show that five years postcriminalization the market has rebounded and the probability of STI transmission in the general population is likely to have increased.