Traditions and customs that determine who fills in the employment contract day-to-day are almost always informal based on history and implicit understandings between employees and employer. The questions then arise, why do these traditions or customs have any force? Why does anyone believe in them?
As time passes and a particular employment relationship matures, the immediate terms of trade between employee and employer are less and less disciplined by market competition, because the fortunes of the two parties involved become more and more intertwined through the development of relation-specific assets. For employer and employee (to differing degrees in different cases), finding a new match is usually much less economical-and often increasingly so than keeping on with the current relationship. (Indeed, both parties have an interest in taking steps to increase the ties that bind the other party, simply to improve their bargaining positions.) leia todo o artigo
