Dr. Sara Roy is probably the most prolific and eruditious western writer and researcher on the Gaza Strip especially regarding the political economy of the Gaza and also the rise of political Islam.
"Dr. Sara Roy is a Professor at the Center for Middle Eastern Studies at Harvard University. Dr. Roy has worked in the Gaza Strip and West Bank since 1985 conducting research primarily on the economic, social, and political development of the Gaza Strip and on U.S. foreign aid to the region. Dr. Roy has written extensively on the Palestinian economy, particularly in Gaza, and has documented its development over the last three decades"
Dr. Roy has a new book coming out soon: Failing Peace: Gaza and the Palestinian-Israeli Conflict
Amazon link:
http://www.amazon.com/gp/product/0745322344/002-4750258-7334423?ie=UTF8