- How do you evaluate Japan's performance during the last two decades? What is wrong with the economy? Is it a lack of supply (structural) problem or a lack of demand one? 2. How do you assess the BOJ's actions during the "lost decade" and moving into the early 2000s? 3. How should policymakers address Japan's economies woes? How feasible are the potential solution? Should the BOJ increase the interest rate? If so, what would be the appropriate timing?