The most common type of headache is tension headache. It is likely caused by tight muscles in your shoulders, neck, scalp, and jaw. A tension headache: 1  May be related to stress, depression, anxiety, a head injury, or holding your head and neck in an abnormal position.  Tends to be on both sides of your head. It often starts at the back of the head and spreads forward.
The BLS reports that the upper 10 percent of marketing managers earned more than $187,199, as did managers in advertising and promotions. Market research analysts in the top ten percent earned more than $116,740.
Market research analysts earned a median salary of $61,290 in 2014, according to the BLS. The best-paid earned more than $116,740, while the lowest-paid earned less than $33,460. The aerospace product and parts manufacturing and semiconductor and electronic component manufacturing industries pay market research analysts particularly well.