“…9 An important observation to note in both graphs of Figure 3 is that 11 states' personal income (Delaware, Iowa, Kansas, Louisiana, Montana, Nevada, North Dakota, Oklahoma, South Dakota, West Virginia, and Wyoming) respond positively to a positive oil price shock. Interestingly, while Oklahoma and Wyoming, and to a lesser degree North Dakota, have an above average percentage of their gross state products devoted to oil and gas production, we are unable to identify other relevant common traits amongst these states to 9 The data used in the figures span an entire column or row in Table 4. The OLS fitted lines shown in Figures 3 through 6 are based on unconditional estimates as there are no other regional variables employed in the estimation.…”