Germany, now less expensive?

I posted this to Facebook, May 5, 2016.
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It seemed to me on our recent trip to Europe that "stuff", mostly what we bought to eat and drink, seemed inexpensive--a 21st century 1st for me. The narrower exchange rate didn't capture the change. My neighbor lead me to the "Big Mac" index of Economist magazine (smarter people than I take it seriously). Indeed, It tells me I paid almost 20% less than I should (with correct exchange rate.)