Experiments and Replication: How much of published scientific research is false?

Hi, I just finished listening to a Planet Money segment that made me think of the conversation the iSWOOP group had in December 2015.

http://www.npr.org/podcasts/510289/planet-money

Check out the podcast from January 15, 2016.

How much of published scientific research is false? Scientists are trying to figure it out.