>>7540373pretty much everything that
>>7540384 said affects inflation and the flow of money in the US, which has an inverse relationship with unemployment.
when the inflation rate is low and the fed can reasonably decrease their interest rates, businesses are able to take out loans for cheaper, which also allows them to hire more people.
however, the opposite is true for when the inflation rate gets too high.
pic is of the philips curve, which details the relationship between inflation and unemployment mentioned earlier.