later developed by Laurence Iannaccone and others.

From this period until the 2000s Bainbridge published more books dealing with space, religion, and psychology. These included a text entitled Experiments in Psychology (1986), which included psychology experimentation software coded by Bainbridge. He also studied the religious cult the Children of God, also known as the Family International, in his 2002 book The Endtime Family: Children of God.