With credence goods consumers cannot judge the quality they receive compared to the quality they need. The needed quality can only be observed by an expert seller who may exploit the information asymmetry by cheating. In recent years various contributions have analyzed the credence goods problem...

A competitive market for an experience good is considered where high quality is enforced by repeated game trigger strategies. The goods are demanded by long run (LR) and short run (SR) customers, the former buying repeatedly, the latter only once. SR buyers can free ride on quality enforcement...