At this point, it is nearly impossible to escape discussion of the aging of the baby boom and its implications for Social Security. No set of reasonable demographic and economic assumptions yields a forecast of long-term solvency for the program as it exists today (Board of Trustees 1997; Congressional Budget Office (CBO) 1997). Some reform is necessary. The open questions are which reforms and...

As environmental criteria become more and more important for the energy systems operation and planning, this paper proposes a method that can support the decision makers in future electricity systems planning. The evaluation of future electric power transmission investment plans is based on a social welfare analysis when the external costs of production are internalized. The social benefit can ...

When the discount rate falls, investment should rise. Thus with time-varying discount rates and instantly changing investment, investment should positively covary with current stock returns and negatively covary with future stock returns. Aggregate nonresidential U.S. investment contradicts both these implications, probably because of investment lags. Investment plans, however, satisfy both imp...

This paper examines the migration response to a millionaire tax in New Jersey, which raised its income tax rate on top earners by 2.6 percentage points to 8.97 percent, one of the highest tax rates in the country. Drawing on unique state tax micro-data, we estimate the migration response of millionaires to the rate increase, using a difference-in-differences estimation strategy. The results ind...

A multistage decision process for transportation investment planning is described. Most transportation investment problems inherently involve multiple criteria and uncertainty. To deal with the variations arising from changes in external environments, robust contingency plans should be integrated in the planning process-not after plans are developed-to account for uncertainty. With the proposed...

Social Security is in trouble. With declining population growth and rising life expectancy, the cost of Social Security benefits is rising relative to payroll tax revenues. As a result, the Social Security retirement fund is expected to run out around 2030.1 Recently, the 1994–1996 Advisory Council on Social Security (1997) proposed three different plans to address the problem. Interestingly, a...