The use of botanical dietary supplements has grown steadily over the last 20 years despite incomplete information regarding active constituents, mechanisms of action, efficacy, and safety. An important but underinvestigated safety concern is the potential for popular botanical dietary supplements to interfere with the absorption, transport, and/or metabolism of pharmaceutical agents. Clinical t...

Abstract We study a unique dataset with comprehensive coverage of daily prices in large multi-product retailers Israel. Retail stores synchronise price changes around occasional ‘peak’ days when they reprice 10% their products. To assess aggregate implications partial synchronisation, we develop new model which firms face economies scope adjustment, and synchronisation is endogenous. Synchronis...