Complex sentence: In the 1990s and 2000s Cochrane studied politics at the University of Sheffield and the London School of Economics (LSE), before becoming a fellow and lecturer at LSE.
Split into simpler sentences: In the 1990s and 2000s Cochrane studied politics at the University of Sheffield and the London School of Economics (LSE). Cochrane 2007b He subsequently becoming a fellow and lecturer at LSE.