The Commissioner of Labor, with the advice and aid of advisory councils, 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 on and publish the results of investigations and research studies.