Economics Research
http://economics.harvard.edu/pages/research
https://edirc.repec.org/
http://www.sscnet.ucla.edu/ssc/labs/cameron/e143f98/topics.htm
http://www.uww.edu/cobe/economics/econugr
https://economics.uchicago.edu/about/research.shtml
https://www.aeaweb.org/gradstudents/Miscellaneous_Topics.php
EconomicsResearch1.htm
http://www.epi.org/research/
http://www.epi.org/research/economic-growth/
https://economics.unca.edu/undergraduate-research
http://ucsbgreencampus.com/economics-research-papers-how-to-select-a-good-topic.htm
http://www.piie.com/research/topics/hottopic.cfm?HotTopicID=6