Kinds of scarcity asks the question allocation usually skips: why is this good scarce? Four answers, and they do not share a remedy. Natural scarcity — prime urban land, transplantable organs, time — is genuinely finite. Transitional scarcity — housing, energy infrastructure, trained clinicians — could be relieved by production the ecology has not yet built. Manufactured scarcity — licensing walls, cartel behavior, exclusive control, deliberate supply constraints — is scarcity an institution creates or preserves. Positional scarcity — prestige, elite status, a political office — takes its value partly from the fact that not everyone can have it.
The distinctions carry real force. Standing justifies public effort to reduce transitional scarcity; antitrust and institutional reform are the tools against manufactured scarcity; but natural and positional scarcity cannot be produced away and genuinely require allocation. The most common political error is to treat a manufactured or transitional shortage as if it were natural — accepting exclusion as a fact of the world when it is really a fact of the rules.