Front cover; Handbook of Development Economics; Copyright page; Introduction to the Series; Contents of the Handbook; Introduction; Contents of Volume 4; Part 10: New Insights into Rural and Agricultural Development; Chapter 17. Economic Development and the Decline of Agricultural Employment; Chapter 48. Information Networks in Dynamic Agrarian Economies; Part 11: Public Goods and Political Economy: Theory and Evidence; Chapter 49. Public Action for Public Goods; Chapter 50. Understanding Political Corruption in Low Income Countries