Despite these strengths in style, the method and arguments fail to convince this reader of the validity of his long-wave theory of economic and political behavior.
In this exposition on long-wave theory, as with previous long wave theory presentations, the argument relies on the use of smoothed data to show the long term trends.
The difficulties in the use of chaos theory, though, do not invalidate the body of his presentation because Professor Berry's use of chaos theory fails to enhance or clarify his long-wave theory. The only role of chaos theory is to avoid Slutzky's critique, which it fails to do.