may have had an influence on

也许正是这造就了
the New York skyline during that time period.

当时的纽约天际线
Here's just a picture, by the way,

来看一下这幅图
of the tall buildings in New York and when they were all constructed.

是纽约所有高大建筑及其建成时间
You see huge boom during this period,

可以看出这段时期的急速增长
and then a long malaise during the middle of the century, during wartime,

和在本世纪中期的战争年代的长期低迷
and then the market picked back up.

然后市场又开始回升
I'll tell you one sort of shocking thing to me is that

我要告诉大家一件让我很震惊的事情
the residential mortgage backed security market completely

住宅抵押担保证券市场
disappeared in the '30s

在三十年代完全消失
and that commercial one building/one bond market

而且商业建筑证券市场
completely disappeared at least by 1940 or so.

也在1940年左右完全消失