If a country was moving from a command to a mixed market economy it would most likely

Govements' control of major production lines would decline.

Explanation:

In a command economy, the government controls what is produced and in what amounts. Thus, the government is the sole overseer or the production. Everything depends of the dictates of the governments.

However, in a mixed economy, the market forces and governments decisions determine what goods and services are produced and in what quantity. Various factors come into play, such as supply and demand, inflation, small scale production and trade. Thus, with the passage of time, the governments grip on the means of production eventually decreases.