Monday, October 11, 2010

Buscant el Nobel

MARKETS WITH SEARCH FRICTIONS

El reconeixement de que l'equilibri del mercat no és senzill ni únic, va portar a Diamond a fer èmfasi en els costos de cercar la millor opció, i alhora va assenyalar ja fa més de tres décades que hi podia haver molts equilibris possibles. I ara juntament amb Mortessen i Pissarides els han donat el Nobel.
La seva contribució s'ha aplicat també a l'economia de la salut. Un bon exemple recent és "Insurance Search and Switching Behaviour at the time of the Dutch Health Insurance Reform". Els resultats tenen implicacions serioses per als contractes col.lectius d'assegurança, destaco el següent:
"We argue that search costs are heterogeneous and that individuals with low search costs are more likely to obtain an offer from a collective contract. This generates a situation of price discrimination which causes that individuals without an offer from a collective contract (and most likely high search costs) pay a higher premium and also obtain a reduced insurance coverage. Stahl (1989) argues that fewer informed consumers (as is the case in the market for individuals without collective contract) leads to more dispersion is premiums. From this observation one may question the usefullness of allowing for collective contracts. Without collective contracts there would be less variation in premiums and insurance coverage within the full population, which might equalize the access to health care."


Ara bé, cal recordar també un article clau de Peter Diamond sobre economia de la salut publicat a Econometrica "Organizing the health insurance market". Algunes idees han estat recuperades a l'Affordable Care Act en la forma de Health Insurance Exchanges. Quan es posi a la pràctica sabrem exactament què dona de si.

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