Von Prondzynski's published academic output has been influential in particular in the field of industrial relations and employment law. In his early work he argued for a disengagement of the law from industrial relations, taking the position that problems and disputes were better resolved through bargaining than through litigation. The most elaborate expression of his views during this period is contained in his book "Freedom of Association and Industrial Relations" (1984). However, from the later 1980s onwards his views began to change, and he argued for a framework of employment regulation that took account of economic pressures and the need to maintain competitive conditions. This culminated in his contribution to a major international book in 2000 in which he argued that the law should protect employees' rights, but also promote business success and economic growth. He has also published a number of books and articles on social policy and in particular on the importance of legal protection against discrimination.