Population growth and decline

He teamed up with Walter Scheidel, a Stanford classicist and historian, to create a model of population growth and decline based on coin-hoard data gathered over the years.

他与Walter Scheidel合作，Walter Scheidel是斯坦福的一个古典学者与历史学家。他们发明了一个人口增长模型，这个模型基于钱币藏匿的数据，这一工作已进行多年。

Now even the project's greatest cheerleaders talk of a continent facing a "Bermuda triangle" of debt, population decline and lower growth.

现在，即使是该计划最大的支持者也在谈论面临债务、人口减少和低增长的“百慕大三角”大陆的话题。

It is the main influence behind the decline of population growth and, perhaps even more important, is shifting the balance of age groups within a population.

它也是人口增长减慢背后的主要推动力。也许更重要的是，它正在改变世界人口中的年龄群体间的相互平衡。