Final answer:
The value of 800 yen in 2000 would generally be better than in 2010 due to the effects of inflation, which usually decreases currency's purchasing power over time. However, the actual value could also be affected by the yen's international exchange rate. Without specific data for the period between 2000 and 2010, one can only suggest that 800 yen would have more buying power in 2000.
Step-by-step explanation:
In considering whether 800 yen in 2000 or 800 yen in 2010 is a better value for your money, we need to evaluate the concept of purchasing power parity (PPP) and the inflation rate over the decade. Due to inflation, the purchasing power of a currency typically decreases over time. Therefore, 800 yen would likely buy more in 2000 than it would in 2010. However, the actual value can also be affected by the market exchange rate against other currencies, like the U.S. dollar. For instance, if the yen was stronger against the dollar in 2010 than in 2000, it might give you more purchasing power internationally even if domestic inflation was present.
To illustrate with an example (although outside the 2000 to 2010 range for reference), if you convert Japan's GDP into U.S. dollars using market exchange rates, you will notice fluctuations; ¥500 trillion was worth $4.6 trillion in 2008 at an exchange rate of 108 yen/dollar and $5.5 trillion in 2009 at a rate of 90 yen/dollar. This suggests that the yen was stronger relative to the dollar in 2009.
Applying this to your question, you'd need to look at the exchange rate trends and inflation rates between 2000 and 2010 to make a true comparison of value. Without access to specific year-to-year inflation rates or exchange rates within this range, it's difficult to provide an exact answer, but considering inflation alone, 800 yen would generally have more buying power in 2000 compared to 2010.