Human resource management is the management of an organization's workforce. It is responsible for the attraction, selection, training, assessment, and rewarding of employees, while also overseeing organizational leadership and culture, and ensuring compliance with employment and labor laws. wikipedia.org

Economics is the social science that studies economic activity to gain an understanding of the processes that govern the production, distribution and consumption of goods and services in an exchange economy.

Mathematics is the study of topics such as quantity, structure, space, and change. There is a range of views among mathematicians and philosophers as to the exact scope and definition of mathematics. wikipedia.org

Labour law (also labor law or employment law) mediates the relationship between workers (employees), employers, trade unions and the government. wikipedia.org

The human resource consulting industry has emerged from management consulting and addresses human resource management tasks and decisions. HR Consultants can fill two typical roles (1) Expert Resource Consultant (2) Process/People consultant. wikipedia.org