The outcomes in the bottom half of the game tree describing the last (the 20th) submarket of the chain store paradox in Figure are labeled N.A. (not applicable). Why? What specific equilibrium concept in sequential games rules out the applicability of these outcomes? How would you describe the game tree from node E onward as opposed to the game tree from node Donward?

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The Chain Store Paradox Accommodate ($80, $10) Fight Accommodate ($100, 0) Enter (-$10,-$10) Accommodate PE D ($80, $10) Stay Out 1 사 Fight ($60, 0) Enter Accommodate N.A N.A Accommodate N.A N.A Enter ( H Fight Fight (-S10,-$10) PEE Accommodate PE A ($80,310)-( Stay Out Fight Accommodate ($100, 0) Stav Out Fight (560, 0) 18th Store 19th Store 20th Store Note: Payoffs are listed (Incumbent, Potential Entrant) in thousands. N.A. (not applicable).