"It represents a change in the opportunity structure of America."

That was the opportunity structure prevailing in the era in which today's chief executives were nourished.

A political opportunity structure has been defined as the circumstances surrounding a political landscape.

Political opportunity structures are prone to change and can alter in days (or last for decades).

Target backcloth (the spatial opportunity structure of crime sites)

Actions taken at mega conferences indirectly build new institutional domestic capacity by creating domestic political opportunity structures.

Although some of these opportunity structures - provided ironically, by the legal system itself-could be blocked, it is unlikely that they would be.

Gelb suggest that there are "political opportunity structures" to help influence policy makers .

Doug McAdam summarizes at least four key dynamic components of the political opportunity structure:

Political opportunity structures can constrain or expand the field of collective action in four ways: