The commissioner shall take all appropriate steps to reduce and prevent unemployment; to encourage and assist in the adoption of practical methods of vocational training, retraining and vocational guidance; to investigate, recommend, advise, and assist in the establishment and operation by municipalities, counties, school districts, and the state, of reserves for public works to be used in times of business depression and unemployment; to promote the reemployment of unemployed workers throughout the state in every other way that may be feasible; and to these ends to carry and publish the results of investigations and research studies.