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In 1990, the economist Paul Krugman wrote Productivity Growth isn't everything, but in the long-run, it is almost every- thing (a) With reference to the models and data we discussed in class, to what extent do you agree with the above statement? [10 marks] (b) Consider two economies that are identical, except that one has a higher growth rate of total factor productivity. According to the Solow and Ramsey models, will there be any difference in the level of GDP per effective worker in the long run? Explain your answer. [10 marks]