Everything can be explained, to some degree, by marrying economics to physics. This book does that:
Experimental Econophysics: Properties and Mechanisms of Laboratory Markets, by Ji-Ping Huang [pictured here], Springer, 2014, ISBN 978-3-662-44234-0. The author explains:
“Experimental Econophysics describes the method of controlled human experiments, which is developed by physicists to study problems in economics or finance, namely stylized facts, fluctuation phenomena, herd behavior, contrarian behavior, hedge behavior, cooperation, business cycles, partial information, risk management, and stock prediction. Experimental econophysics along with empirical econophysics are two branches in the field of econophysics.”