Dynamic Trends of Carbon Intensities among 127 Countries

Many countries in the world have been experiencing widely varying rates of change in their carbon intensity (CI) of economic output. The dynamic trend of CI in this research is measured by the progress ratio (PR) from an experience curve (EC) involving 127 countries during the period of 1980–2011. The overall average PR of 88.8% estimated for the total group of 127 indicates a decreasing trend of carbon intensity. This means that each doubling of the cumulative CO2 emission by this group has reduced carbon intensity by 11.2%. While a majority of 83 countries experienced a decreasing trend with an average PR of 73.1%, the remaining 44 countries have experienced an increasing trend with an average PR of 114.5%. When two different types of EC, classical and kinked, were applied, 73 countries displayed a kinked slope with an average PR of 73.4%, and 54 countries displayed a classical slope with an average PR of 104.2%. Examination of the type of trend and slope of EC suggests the chance of a major improvement of the future CI in the following order: (1) the 35 countries with a classical slope and an increasing trend of CIs; (2) the nine countries with a kinked slope and an increasing trend of CIs; (3) the 19 countries with a classical slope and a decreasing trend of CIs; and (4) the 64 countries with a kinked slope and a decreasing trend of CIs. Further implications from these findings are discussed

Market Valuation of Tax-Timing Options: Evidence from Capital Gains Distributions

We examine a distribution that is taxed as a capital gain rather than as a dividend. Since the distribution induces a realized capital gain while the price change is an unrealized gain, ex-day return behavior provides evidence of the value of tax-timing capital gains. We show that investors are compensated 7� in unrealized gains for each dollar of realized capital gains, that is, $1 of realized capital gains is equivalent to 93� of unrealized gains. An investor with a tax rate on realized gains of 15% has an effective tax rate on unrealized capital gains of 8.6%. Copyright 2006 by The American Finance Association.