According to an article in The Economist, since the financial crisis, the demand for oil tankers has boomed: a combination of weak spot prices and higher futures prices encouraged traders to hire tankers to store oil at sea and cash in on the price gap. This was driven by the assumption that supply and demand for crude will eventually rebalance. Bulk carriers, meanwhile, have been hit by massive over-capacity, as Chinese demand for such commodities reduced drastically. Do you think oil tankers are normal goods and bulk carriers are inferior goods or vice versa? Is your answer important for predicting how many oil tankers will be in the market as a result of a price increase in oil? What about bulk carriers, if the prices of ore and coal are still decreasing? Briefly explain.