Richard Koo’s research on this country led him to coin the term “balance-sheet recession,” in which private debt stifles economic growth. Simon (-5[1])Kuznets once remarked that all world economies are either developed, underdeveloped, (15[1])Argentina, (15[1])or this (15[6])country. This country is the namesake of a measure that sums short-term interest rates, the output gap, and inflation. Edward Prescott co-authored a paper that blamed low total factor productivity and a shortening of the (15[1])workweek for this country’s (*) “Lost (10[1])Decade,” which began in 1990 and extended into a “Lost 30 Years.” A more (10[1])conventional (-5[1])explanation of that decline focuses on the rapid aging of this country, which has the highest proportion of elderly (10[1])citizens in the world. For 10 points, name this country which was led by a prime minister who championed “Abenomics.” [ah-bey-nomics] (10[1])■END■