Final answer:
The new average tax rate required to achieve an 11.5 percent increase in tax revenues would be approximately 11.15 percent, assuming all taxpayers are subject to the income effect.
Step-by-step explanation:
To calculate the new average tax rate that would result in an 11.5 percent increase in tax revenues, we begin by determining the current tax revenue. With an average income of $62,000 and an average tax rate of 10 percent, the current tax revenue per taxpayer is $62,000 * 0.10 = $6,200. An 11.5 percent increase in this revenue would be $6,200 * 1.115 = $6,913.
To find the new average tax rate, we set the increased revenue equal to the new tax rate times the average income: $6,913 = new tax rate * $62,000. Solving for the new tax rate gives us new tax rate = $6,913 / $62,000 = 0.1115, or 11.15 percent.
Therefore, if the income effect is in effect for all taxpayers, the new average tax rate required to achieve an 11.5 percent increase in tax revenues would be approximately 11.15 percent.