This essay surveys macroeconomic issues that marked the transition from centrally planned to market economy in Central and Eastern European and former Soviet Union countries. We first establish a set of stylized facts of the transition so far, namely: (1) output fell, (2) capital shrank, (3) labor moved, (4) trade reoriented, (5) the structure changed, (6) institutions collapsed, and (7) transition costs. We then critically survey the theoretical literature on transition, discussing various explanations for the initial output fall as well as medium term issues, such as optimal speed of transition, disorganization, institutions and sectoral reallocation as a source of output dynamics. Last, we review the empirical literature to assess how we...