The Big Bang Theory | The Texas Chain Saw Massacre | The Jesus and Mary Chain | Theory of a Deadman | music theory | chain | probability theory | Chain Reaction | theory | Theory of relativity | Chain store | theory of relativity | Social learning theory | Game Theory (band) | Game Theory | Conspiracy theory | unemployment | Music theory | K-theory | AP Music Theory | Piaget's theory of cognitive development | Markov chain | Hudson River Chain | conspiracy theory | Chemical reaction | Chain Reaction (song) | Thermidorian Reaction | Theory of Relativity | Theory | Terror management theory |
As part of his research career, he originated the insider-outsider theory of employment and unemployment with Assar Lindbeck, the theory of high-low search with Steve Alpern, and the chain reaction theory of unemployment and the theory of frictional growth with Marika Karanassou and Hector Sala.