Transition trajectories have varied considerably in practice. Some nations have been experimenting with market reform for several decades, while others are relatively recent adopters (e.g., North Macedonia, Serbia, Montenegro), and Albania. In some cases reforms have been accompanied with political upheaval, such as the overthrow of a dictator (Romania), the collapse of a government (the Soviet Union), a declaration of independence (Croatia), or integration with another country (East Germany). In other cases economic reforms have been adopted by incumbent governments with little interest in political change (China, Laos, Vietnam). Transition trajectories also differ in terms of the extent of central planning being relinquished (e.g., high centralized coordination among the CIS states) as well as the scope of liberalization efforts being undertaken (e.g., relatively limited in Romania). Some countries, such as Vietnam, have experienced macro-economic upheavals over different periods of transition, even transition turmoil.