An article on bloomberg.com in 2019 discussed revised GDP data from the Japanese government that showed a larger increase in real GDP: “Part of the upward revision was due to a change in estimated inventories, while private consumption rose less than first estimated.” 

a. Is the change in estimated inventory investment likely to have been an increase or a decrease? Briefly explain. 

b. Is there a connection between the revised estimate for the change in inventory investment and the revised estimate for consumption spending? Briefly explain.