In startup companies, HR's duties may be performed by trained professionals. In larger companies, an entire functional group is typically dedicated to the discipline, with staff specializing in various HR tasks and functional leadership engaging in strategic decision making across the business. To train practitioners for the profession, institutions of higher education, professional associations, and companies themselves have created programs of study dedicated explicitly to the duties of the function. Academic and practitioner organizations likewise seek to engage and further the field of HR, as evidenced by several field-specific publications. HR is also a field of research study that is popular within the fields of management and industrial/organizational psychology, with research articles appearing in a number of academic journals, including those mentioned later in this article.
In the current global work environment, most companies focus on lowering employee turnover and retaining the talent and knowledge held by their workforce. New hiring not only entails a high cost but also increases the risk of the newcomer not being able to replace the person who was working in that position before. HR departments also strive to offer benefits that will appeal to workers, thus reducing the risk of losing knowledge.