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.
The trick to understanding comparative advantage is in the phrase lower cost. What it costs someone to produce something is the opportunity costâthe value of what is given up. Someone may have an absolute advantage at producing every single thing, but he has a comparative advantage at many fewer things, and probably only one or two things. (In Jordan's case, both basketball and also as an endorser of Nike.) Amazingly, everyone always has a comparative advantage at something. Let's look at another example. Suppose you and your roommate want to clean the house and cook a magnificent Chicken Kiev dinner for your friends one night. The easy case is when you are each better at one activity.