Now consider the relationship between the price level and the quantity of money that people demand. The lower the price level, the money the typical transaction requires, and the money people will wish to hold in the form of currency or demand deposits.

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In line with other previous and contemporaneous proposals, in 1912 the meteorologist  alfred wegener  amply described what he called continental drift, expanded in his 1915 book the origin of continents and oceans and the scientific debate started that would end up fifty years later in the theory of plate tectonics.