What will international macroeconomics look like in the twenty-first century? While historically the study of international trade and finance has associated the movement of goods and financial flows across the distinct geographic regions as a phenomenon only between nations, this definition will become less useful as countries become more integrated. The approach that researchers have recently adopted to further our understanding of how economic interactions between countries will evolve as national borders decline in importance is to analyze economic interactions within a country - i.e. 'intranational macroeconomics'. This book brings the intranational macroeconomics literature into clearer focus by collecting the strands of research into a common thread. Each chapter of the book aims to answer the following two questions: First, what contributions do national and geographic borders make to our understanding of macroeconomics? Second, how will these contributions change as the world becomes more integrated?