規模の経済、最低効率的規模（MES）および組織コスト
導入済み| English | 意味 |
|---|---|
| minimum efficient scale/ˈmɪnɪməm ɪˈfɪʃənt skeɪl/ | 最小適正規模 |
| X-inefficiency/eks ɪnɪˈfɪʃənsi/ | X非効率 |
A decision you can investigate
- A larger plant can spread specialist equipment costs over more output. A bigger management hierarchy can also slow decisions. A nearby training cluster can help firms of several sizes.
- Separate benefits inside one firm from benefits of an expanding industry.
Build the explanation
- Economies of scale reduce long-run average cost as the firm increases its chosen scale; diseconomies raise it. Minimum efficient scale 最小有效规模 MES is the smallest scale/output at which the lowest LRAC is attained in the stated technology. Internal economies arise within a firm: financial access/terms, technical specialization or indivisible equipment, specialist managers, spreading marketing costs, bulk purchasing and spreading risks across activities. Each needs a mechanism, not just a label.
- External economies benefit firms through industry/location development, including skilled labour availability, transport links and knowledge sharing. They can shift a firm’s LRAC rather than being a movement caused only by its own scale. Diseconomies can arise from communication delays, coordination problems and X-inefficiency X非效率: actual costs above attainable efficient costs because organizational slack or weak incentives persist. X-inefficiency need not be unique to large firms or a technological necessity.
Work through the evidence
- In a fictional technology comparison, achievable minimum average costs at scales100,200,300,400 are12,9,9,11. Economies occur100→200; the flat minimum9 spans200–300; MES is200, the smallest scale attaining it. Expanding300→400 shows diseconomies in this comparison.
- At output200, lowest feasible total cost is1800, but poor coordination leads to actual cost2000: excess cost200, average1 per unit, is a possible X-inefficiency gap if the efficient benchmark is credible. It is not evidence that the minimum technology itself became dearer.
- A shared skills programme lowers attainable average cost at every listed scale by1, to11,8,8,10; this external improvement shifts the comparison downward. It is separate from one firm moving between scales.
スケール表におけるMESは何か？
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200 は、最小平均コスト9 に達する最初のスケールである。
生産量200 における可能性のある超過コストギャップは何か？
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実際の2000 から非効率なベンチマーク1800 を引いた値が、200 の総コストに等しい。
観測された平均コストの低下は、常に規模の経済性を証明するものではない。
難易度 1/5 · 100 コイン + 今日初回完了時に小ボーナス付与
稼働率、投入価格、技術、あるいは外部の変化がその理由として説明され得る。
Test the limits
- These discrete scale data illustrate the concepts, not a complete envelope of short-run plants. MES may be a range or change with technology, and its size relative to market demand affects how many efficient firms can fit. A large MES can encourage concentration but does not alone establish monopoly power.
- Bulk purchase savings may reflect bargaining transfers rather than lower social resource use. Risk diversification can fail when shocks are correlated. Specialist management can reduce costs or add bureaucracy. External industry growth can also congest roads or raise input prices. Compare actual versus attainable cost carefully before diagnosing X-inefficiency; demand weakness and capacity utilization can raise observed average cost without a change in LRAC.
外部のスケール便益はどれか？
難易度 1/5 · 100 コイン + 今日初回完了時に小ボーナス付与
共有されたプールは、個別企業のスケール選択の外側で発展する。
Apply and explain your answer
- Why is MES200 rather than300 when both have average cost9?
- MES is the smallest scale reaching the lowest attainable average cost. Both attain9, but200 is smaller.
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
- minimum efficient scale: The smallest scale/output attaining the minimum long-run average cost under stated conditions.
- X-inefficiency: Actual resource cost above an attainable efficient benchmark because resources are not used efficiently.
In a fictional technology comparison, achievable minimum average costs at scales100,200,300,400 are12,9,9,11. Economies occur100→200; the flat minimum9 spans200–300; MES is200, the smallest scale attaining it. Expanding300→400 shows diseconomies in this comparison. At output200, lowest feasible total cost is1800, but poor coordination leads to actual cost2000: excess cost200, average1 per unit, is a possible X-inefficiency gap if the efficient benchmark is credible. It is not evidence that the minimum technology itself became dearer. A shared skills programme lowers attainable average cost at every listed scale by1, to11,8,8,10; this external improvement shifts the comparison downward. It is separate from one firm moving between scales.
These discrete scale data illustrate the concepts, not a complete envelope of short-run plants. MES may be a range or change with technology, and its size relative to market demand affects how many efficient firms can fit. A large MES can encourage concentration but does not alone establish monopoly power. Bulk purchase savings may reflect bargaining transfers rather than lower social resource use. Risk diversification can fail when shocks are correlated. Specialist management can reduce costs or add bureaucracy. External industry growth can also congest roads or raise input prices. Compare actual versus attainable cost carefully before diagnosing X-inefficiency; demand weakness and capacity utilization can raise observed average cost without a change in LRAC.
Economies of scale reduce long-run average cost as the firm increases its chosen scale; diseconomies raise it. Minimum efficient scale MES is the smallest scale/output at which the lowest LRAC is attained in the stated technology. Internal economies arise within a firm: financial access/terms, technical specialization or indivisible equipment, specialist managers, spreading marketing costs, bulk purchasing and spreading risks across activities. Each needs a mechanism, not just a label.