Our initial assumption was that it would grow to $14.7 trillion in 2015. After we adjusted our analysis, we still see debt hitting 14.5 trillion in 2015.
The simple r-g assumption is one of the most important in debt dynamics: an r-g of greater than zero (when interest rates are greater than GDP growth) means that the debt stock increases over time.
简单的对（r-g）的假设是债务动态中最重要的部分之一。
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Using a real option game theory and method, under a stochastic market, and assumption the target firm is both debt and equity financing, the paper analyzes the timing and terms of mergers.