This research applies a transaction-focused institutional analysis to compare the value of political capital in different institutional domains of China's market economy. Our results show that the value of political capital is associated with institutional domains of the economy in which agents can use political connections to secure advantages. Political capital is most fungible in institutional domains where government restricts economic activity. In this sense, the value of political connections in China does not differ fundamentally from patterns observable in established market economies. We interpret this as evidence suggesting China may have experienced a tipping point in its transition to a market economy around the turn of the new century. (Contains 6 tables and 2 figures.)