<prompt> Translate the following text to EnglishKama ukitazama kitabu chochote kikubwa cha uchumi wa kimataifa, kama vile kitabu cha Krugman na Maurice Obstfeld, bado utaona kwamba sehemu ya fedha ya kitabu hicho inategemea sana karatasi ambazo Mundell aliandika mapema miaka ya 1960.  <response>: And if you look at any major textbook in international economics--such as the perennial best seller by Krugman and Maurice Obstfeld--you still find that the monetary half of the book is very largely based on the papers Mundell wrote in the early 1960s. 