By the way, I forgot to mention there are services out there that calculate the GDP difference in real-time and provide the cost to individual visitors (most auto apply coupons to adjust the base price), but checking and adjusting prices every quarter is more than enough. 🙂
That's really interesting, and a nice simple approach to Purchasing Power Parity which I didn't even talk about in the OP.
By the way, I forgot to mention there are services out there that calculate the GDP difference in real-time and provide the cost to individual visitors (most auto apply coupons to adjust the base price), but checking and adjusting prices every quarter is more than enough. 🙂