財政政策と需要管理
導入済み| English | 意味 |
|---|---|
| fiscal policy/ˈfɪskl ˈpɒlɪsi/ | 財政政策 |
| reflationary policy/rɪˈfleɪʃənəri ˈpɒlɪsi/ | 景気回復政策 |
A decision you can investigate
- A public purchase directly adds demand for production. A tax cut first changes disposable income, of which households may save part.
- Equal budget costs need not give equal initial demand changes.
Build the explanation
- Fiscal policy 财政政策 changes public spending and taxation; monetary policy changes monetary and financial conditions through the central bank and related institutions. Reflationary demand policy seeks to increase spending, often when there is a negative output gap; deflationary demand policy seeks to restrain spending and inflation pressure. A tax cut or higher public purchases can be expansionary; tax increases or spending reductions can be contractionary, depending on financing and responses.
- Public purchases enter G directly. Transfers affect recipients’ disposable income and then consumption or saving rather than automatically entering G. Direct taxes affect disposable income and incentives; indirect taxes can also change prices. Fiscal measures may affect both AD and capacity, but the short-run spending mechanism differs from a later supply improvement. Automatic tax/benefit changes during the cycle differ from a new discretionary decision.
Work through the evidence
- In a fictional closed fixed-price model with no imports or proportional taxes, MPC=0.75 and the spending multiplier is 4. An autonomous G purchase increase 20 initially adds 20 demand; total model income rises 80 if the assumptions hold. A separate lump-sum tax cut 20 increases disposable income 20, of which initial consumption is 15 and saving 5. Its total model demand effect is 15×4=60, not 80.
- In a separate balanced-budget change, G rises 20 and lump-sum taxes rise 20 together: initial net spending change=20−15=5, with total model income change 20. The tax and spending changes have equal budget amounts but different first-round expenditure effects. These are fixed-propensity calculations, not universal fiscal forecasts.
税制改革による初期消費20はいくらか？
難易度 1/5 · 100 コイン + 今日初回完了時に小ボーナス付与
MPC0.75に追加可処分所得20を掛け合わせると15が得られる。
閉鎖型モデルにおけるGの総反応はいくらか？
難易度 1/5 · 100 コイン + 今日初回完了時に小ボーナス付与
初期支出 20 に乗数 4 を掛けると 80 となる。
現金給付は自動的に政府購買（G）に計上される。
難易度 1/5 · 100 コイン + 今日初回完了時に小ボーナス付与
これは給付であり、受給者の支出決定がCに影響を与える可能性がある。
Test the limits
- Government borrowing, interest rates, imports, expectations, capacity and implementation timing can change the effects. At capacity, stimulus may raise prices more than real output; debt-service costs and possible displacement of private activity matter. Fiscal contraction can weaken employment and public services even while reducing demand pressure.
- Tax cuts may be saved if confidence is weak; purchases can be delayed or poorly targeted. Progressive taxes and benefits can stabilize disposable income automatically, but a cyclical deficit is not identical to a deliberate stimulus. Compare timing, distribution, fiscal sustainability and the type of shock. Use the withdrawal-based multiplier when taxes/imports change with income; do not reuse this closed lump-sum model unchanged.
なぜこのケースではGと税の同時増額が需要中立ではないのか？
難易度 1/5 · 100 コイン + 今日初回完了時に小ボーナス付与
指定されたモデルにおける初期純支出の増加分は5である。
Apply and explain your answer
- Why does the equal-size tax cut give a smaller demand increase than the public purchase in this model?
- Only 75% of the additional disposable income is initially consumed. The G purchase directly adds 20, whereas the tax cut initially adds 15 consumption.
用語とそれぞれの意味を結びつけよ。
難易度 2/5 · 140 コイン + 今日初回完了時に小ボーナス付与
各用語を、その明示された経済的関係に用いること。
Use the terms precisely
- fiscal policy: Policy changes to government spending and taxation.
- reflationary policy 扩张性需求政策: Policy intended to increase aggregate demand under the stated conditions.
In a fictional closed fixed-price model with no imports or proportional taxes, MPC=0.75 and the spending multiplier is 4. An autonomous G purchase increase 20 initially adds 20 demand; total model income rises 80 if the assumptions hold. A separate lump-sum tax cut 20 increases disposable income 20, of which initial consumption is 15 and saving 5. Its total model demand effect is 15×4=60, not 80. In a separate balanced-budget change, G rises 20 and lump-sum taxes rise 20 together: initial net spending change=20−15=5, with total model income change 20. The tax and spending changes have equal budget amounts but different first-round expenditure effects. These are fixed-propensity calculations, not universal fiscal forecasts.
Government borrowing, interest rates, imports, expectations, capacity and implementation timing can change the effects. At capacity, stimulus may raise prices more than real output; debt-service costs and possible displacement of private activity matter. Fiscal contraction can weaken employment and public services even while reducing demand pressure. Tax cuts may be saved if confidence is weak; purchases can be delayed or poorly targeted. Progressive taxes and benefits can stabilize disposable income automatically, but a cyclical deficit is not identical to a deliberate stimulus. Compare timing, distribution, fiscal sustainability and the type of shock. Use the withdrawal-based multiplier when taxes/imports change with income; do not reuse this closed lump-sum model unchanged.
Fiscal policy changes public spending and taxation; monetary policy changes monetary and financial conditions through the central bank and related institutions. Reflationary demand policy seeks to increase spending, often when there is a negative output gap; deflationary demand policy seeks to restrain spending and inflation pressure. A tax cut or higher public purchases can be expansionary; tax increases or spending reductions can be contractionary, depending on financing and responses.