State Smith's four canons in his own logic.4.

Meaning: public finance is the economics of the public household — the government's revenue, expenditure, debt and the fiscal constitution that binds them: how the state collects, spends, borrows and balances. Why the state finances at all (the analytical frame): the market failures of Unit 6.1 — public goods (non-rival, non-excludable: defence, justice — the courts themselves the textbook public good), externalities, monopoly, information asymmetry, and the distribution question (the market's verdicts need social correction) — plus development financing (ECO-I Unit 5's planned-development rationale). Importance: allocation (public goods provided), distribution (the equity function — the tax-transfer machine), stabilisation (fiscal policy — Unit 5.3.2), and growth (public capital formation); in Nepal's frame: the plan-and-budget machinery of ECO-I 5.3–5.5 here meets its economic theory.