Municipal and state governments should cooperate with other states’ and municipalities' licensing qualifications to make it possible for workers to move around and enter different job markets with transferable credentials. Many jobs are going unfilled because of restrictions related to credentialing, mobility, and hiring practices: one study suggested that licensing restrictions resulted in teachers near the Oregon border in Washington State being three times as likely to move teaching jobs elsewhere in Washington as to make the much shorter move across the border to teach in Oregon. The lack of cross-state cooperation in recognizing these credentials is a major obstacle to mobility.