skilled and unskilled labor are substitutes: for example, imagine that you can hire four low-skilled non-union workers to move dirt with shovels at $5 an hour, or you can hire one skilled union worker at $23 an hour to move the same amount of dirt with a skid loader. identify at least four different economic concepts that we've covered in this and previous units, what will happen to the demand for skilled labor if the price of unskilled labor increases to $6.00 per hour?