Actual growth, capacity and productivity
| English | 中文 | Pinyin |
|---|---|---|
| potential growth/pəˈtenʃl ɡrəʊθ/ | 潜在增长 | qián zài zēng zhǎng |
| labour productivity/ˈleɪbə ˌprɒdəkˈtɪvɪti/ | 劳动生产率 | láo dòng shēng chǎn lǜ |
A decision you can investigate
- An economy can increase production by using idle resources without installing new capacity. Another can train workers and install machinery, expanding capacity before demand uses it.
- These are distinct growth channels, although they can occur together.
Build the explanation
- Actual growth is an increase in real output over a period; potential growth 潜在增长 expands estimated sustainable productive capacity. Increased consumption, investment, government purchases or net exports can raise aggregate demand and actual output when supply responds. Export-led growth uses rising foreign demand for domestic goods/services; trade can also support specialization, scale and access to inputs or technology. Export revenue is not the same as net-export demand when imports also rise.
- Domestic investment and productive foreign direct investment can build capital or transfer skills; innovation can improve products and processes. A larger or better-skilled labour force, including net migration, can expand capacity when complementary resources and jobs exist. Competition may encourage efficiency and innovation, but the response depends on incentives and market conditions. Productivity is output per unit of input: it can raise capacity and lower unit resource costs, whereas longer total hours alone need not increase output per hour.
Work through the evidence
- Fictional real GDP rises from 450 to 480: growth=(480−450)/450×100=6.67%. Estimated potential stays 500, so greater resource use produces actual growth without potential growth. Subsequent training and capital expansion raise potential to 550: potential growth=(550−500)/500×100=10%; actual output need not instantly reach 550.
- Separately, 100 workers produce 500 units, or 5 per worker. Training raises output to 550 with the same workers and comparable hours: productivity becomes 5.5, up 10%. Adding 10 equally productive workers instead produces 550 but leaves productivity at 5. An export increase 30 combined with an import increase 20 adds only 10 to net exports, other expenditure unchanged.
What is real GDP growth from 450 to 480?
Divide the increase 30 by the original real output 450.
What happens when output rises from 500 to 550 with workers and hours unchanged?
Output per worker increases from 5 to 5.5.
Every purchase of existing financial shares immediately expands productive capacity.
A change in financial ownership is not itself new productive capital.
Test the limits
- The diagram is a separate two-good illustration using standardized output units, not a calculation of GDP by adding unlike physical goods. Moving from inside to an existing frontier illustrates fuller use; shifting the frontier illustrates capacity growth. Switching along a frontier reallocates output and does not establish economy-wide growth.
- Productive FDI differs from a financial purchase of existing shares; even a direct acquisition does not guarantee new capacity. Investment can be inefficient, labour needs equipment, and migration effects depend on skills, participation and infrastructure. Export-led strategies face foreign downturns, protection and imported-input dependence. Faster productivity can release labour in one sector; employment depends on demand and mobility, not arithmetic alone.
If exports rise 30 and imports 20, what is the net-export change?
Exports less imports increases by 30−20.
Apply and explain your answer
- Why does the increase from 450 to 480 not establish potential growth, and why is hiring ten equally productive workers not a productivity improvement?
- Potential remains 500, while actual use increases. Hiring adds total output and inputs proportionately; output per worker stays 5.
Match the terms to their meanings.
Use each term for its stated economic relationship.
Use the terms precisely
- potential growth: An increase in estimated sustainable productive capacity over time.
- labour productivity 劳动生产率: Output per unit of labour input, with the input measure specified.
Fictional real GDP rises from 450 to 480: growth=(480−450)/450×100=6.67%. Estimated potential stays 500, so greater resource use produces actual growth without potential growth. Subsequent training and capital expansion raise potential to 550: potential growth=(550−500)/500×100=10%; actual output need not instantly reach 550. Separately, 100 workers produce 500 units, or 5 per worker. Training raises output to 550 with the same workers and comparable hours: productivity becomes 5.5, up 10%. Adding 10 equally productive workers instead produces 550 but leaves productivity at 5. An export increase 30 combined with an import increase 20 adds only 10 to net exports, other expenditure unchanged.
The diagram is a separate two-good illustration using standardized output units, not a calculation of GDP by adding unlike physical goods. Moving from inside to an existing frontier illustrates fuller use; shifting the frontier illustrates capacity growth. Switching along a frontier reallocates output and does not establish economy-wide growth. Productive FDI differs from a financial purchase of existing shares; even a direct acquisition does not guarantee new capacity. Investment can be inefficient, labour needs equipment, and migration effects depend on skills, participation and infrastructure. Export-led strategies face foreign downturns, protection and imported-input dependence. Faster productivity can release labour in one sector; employment depends on demand and mobility, not arithmetic alone.
Actual growth is an increase in real output over a period; potential growth expands estimated sustainable productive capacity. Increased consumption, investment, government purchases or net exports can raise aggregate demand and actual output when supply responds. Export-led growth uses rising foreign demand for domestic goods/services; trade can also support specialization, scale and access to inputs or technology. Export revenue is not the same as net-export demand when imports also rise.