Six flags operates in an industry dominated by some other large theme park venues including Disney and Great Adventure. About $85\%$ of the industry revenue is generated by the $10$ largest companies and those firms don't change often. Thus, it is not fragmented like, for example, the plumbing industry where no one has a large share.

It is common for larger venues to change pricing and to have special attractions to increase attendance and to seek to take attendance and share away from Six Flags parks. Recently, disposable income has declined due to industrial slowdowns causing a decline in attendance as a theme park is a luxury.

In a PEST analysis of the external environment, we consider the general environment factors of $($P$)$ political$-$legal, $($E$)$ economic, $($S$)$ sociocultural and $($T$)$ technology, thus called PEST, per slide set $3.$

In the description, which PEST factor is clearly discussed