Due to these concerns, lorazepam use is generally only recommended for up to two to four weeks. Lorazepam was initially patented in 1963 and went on sale in the United States in 1977. It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.
David Ricardo, the British economist who invented the theory of comparative advantage in 1817, actually knew about this problem perfectly well, and wrote about it in his book on the subject. So there's no excuse for modern economists to ignore it. Dubious Assumption #6: Short-term efficiency causes long-term growth.
Comparative advantage occurs when one country can produce a good or service at a lower opportunity cost than another. This means a country can produce a good relatively cheaper than other countries.The theory of comparative advantage states that if countries specialise in producing goods where they have a lower opportunity cost â then there will be an increase in economic welfare.Note this is different to absolute advantage which looks at the monetary cost of producing a good.his means a country can produce a good relatively cheaper than other countries. The theory of comparative advantage states that if countries specialise in producing goods where they have a lower opportunity cost â then there will be an increase in economic welfare.