The Latvian Soviet Socialist Republic is never known as Soviet Latvia.
For most of its history, the USSR was a highly centralized state despite its nominal structure as a federation of republics; the decentralization reforms during the era of perestroika and glasnost conducted by Mikhail Gorbachev are cited as one of the factors which led to the dissolution of the USSR in 1991 and the creation of the Commonwealth of Independent States
From the 1930s until its dissolution in late 1991, the way the Soviet economy operated remained essentially unchanged

