The beginning analysis would have to define the demand for labor as the relationship between wages and employment by the employer. The demand for labor is an inverse or negative relationship and is also a derived demand, because it is derived from product demand. As the wage goes up, the level of employment drops. The lower output means lower production and lower production means low demand for labor and lower employment. The supply of labor can be defined as the relationship between wages and employment and shows the behavior of labor suppliers.
Labor supply is a positive relationship.
Yes, they will provide the elements of an answer. Yes, let's look at some preliminary data from the Department of Labor Statistics. We could summarize the whole thing by making up a grid something like the one that will be shown below. It is only when one of the two curves is shifted that we obtain unambiguous qualitative predictions for the change in wages and employment. In another direction the subject of productivity and changes in it are important to the study of the labor input.