---
title: "Research and Development (R&D) — AP Macro Definition"
description: "R&D is spending on innovation that raises technology and productivity, shifting LRAS and the PPC outward. Key driver of long-run growth in AP Macro Topic 5.6."
canonical: "https://fiveable.me/ap-macro/key-terms/research-and-development-r-d"
type: "key-term"
subject: "AP Macroeconomics"
unit: "Unit 5"
---

# Research and Development (R&D) — AP Macro Definition

## Definition

Research and Development (R&D) is investment in creating new technology and innovation, which raises productivity (output per worker), shifts the long-run aggregate supply curve and PPC outward, and drives long-run growth in real GDP per capita (AP Macro Topic 5.6).

## What It Is

Research and Development (R&D) is spending aimed at discovering new technologies, products, and production methods. In [AP Macro](/ap-macro "fv-autolink"), R&D matters because it improves the **level of technology**, and technology is one of the determinants of [productivity](/ap-macro/key-terms/productivity "fv-autolink") in the aggregate production function. When firms or governments invest in R&D, workers can produce more output with the same amount of physical and human capital. That means output per worker rises, and so does real GDP per capita.

Think of it this way. [Capital accumulation](/ap-macro/key-terms/capital-accumulation "fv-autolink") gives workers *more* tools, while R&D gives workers *better* tools. Both raise productivity, but R&D is special because technology can keep improving without running into diminishing returns the way piling up more machines does. That's why questions about *sustainable* economic growth so often point to technological progress as the answer. Policies matter here too. Patent protections and R&D subsidies strengthen the incentive to innovate, while removing them (say, letting anyone copy an invention instantly) weakens it and slows technological progress.

## Why It Matters

R&D lives in **Topic 5.6 (Economic Growth)** in [Unit 5](/ap-macro/unit-5 "fv-autolink"), supporting learning objective **5.6.A**, which asks you to define the measures and determinants of economic growth. The CED says productivity is determined by the level of technology plus physical and [human capital](/ap-macro/key-terms/human-capital "fv-autolink") per worker. R&D is the engine behind the technology piece. It also connects to **5.6.B**, because anything that improves technology shifts both the PPC and the LRAS curve outward, and you may have to draw exactly that. Economic growth questions are where the whole course pays off, since they test whether you can separate short-run demand-side wiggles from genuine long-run increases in an economy's productive capacity.

## Connections

### Productivity and the Aggregate Production Function (Unit 5)

R&D raises the level of technology, which shifts the entire [aggregate production function](/ap-macro/key-terms/aggregate-production-function "fv-autolink") upward. Every worker produces more output at every level of capital per worker. This is the mechanism that turns R&D spending into higher real GDP per capita.

### Capital Accumulation and Physical Capital (Unit 5)

Capital accumulation means adding more machines and tools; R&D means inventing better ones. Adding more [capital](/ap-macro/unit-1/scarcity/study-guide/NQNFJuFA03Xe3Zl82IgD "fv-autolink") eventually hits diminishing returns, but technological progress from R&D doesn't, which is why R&D shows up as the answer to 'what drives sustainable growth.'

### LRAS and the PPC (Units 1, 3, and 5)

Successful R&D shifts the PPC outward, and per LO 5.6.B that's analogous to a rightward shift of LRAS. On a graph, technological progress moves [full-employment output](/ap-macro/key-terms/full-employment-output "fv-autolink") itself, not just a point along the curve.

### [Human Capital (Unit 5)](/ap-macro/key-terms/human-capital)

R&D and human capital reinforce each other. Educated, skilled workers are the ones who do the research, and new technologies often require trained workers to use them. Both are determinants of productivity under LO 5.6.A.

## On the AP Exam

R&D usually appears in multiple-choice questions about the determinants of long-run economic growth. A classic stem asks which factor leads to *sustainable* growth, and technological progress (fueled by R&D) is the kind of answer they're fishing for. Expect policy twists too. One practice-style question asks what happens when a country eliminates patent protections, and the answer is that the incentive for R&D falls and technological progress slows, because innovators can't profit from inventions anyone can copy. Another asks about government R&D subsidies, which shift the aggregate production function up and raise real GDP per capita. On FRQs, no released question has used the term verbatim, but R&D is a textbook cause you can cite when asked to show economic growth graphically. Shift LRAS right or push the PPC outward and explain that improved technology raised productivity.

## Research and Development (R&D) vs Capital Accumulation

Both raise productivity and shift LRAS right, but they're different determinants. Capital accumulation increases the *quantity* of physical capital per worker (more factories, more machines) and faces diminishing returns. R&D improves the *level of technology*, making all existing capital and labor more productive. On the exam, 'investment in new equipment' points to capital accumulation, while 'innovation,' 'patents,' or 'new production methods' point to R&D.

## Key Takeaways

- R&D is investment in innovation that raises the level of technology, one of the three determinants of productivity alongside physical and human capital per worker.
- Successful R&D shifts the aggregate production function upward, so output per worker rises even with the same amount of capital.
- Because technological progress doesn't face diminishing returns the way adding more capital does, R&D drives sustainable long-run growth.
- Improved technology from R&D shifts both the PPC and the LRAS curve outward, and the CED treats those two shifts as analogous.
- Policy shapes R&D incentives. Patent protections and subsidies encourage innovation, while eliminating patents lets copiers free-ride and slows technological progress.
- Economic growth from R&D is measured as an increase in real GDP per capita over time, not just an increase in total GDP.

## FAQs

### What is research and development (R&D) in AP Macro?

R&D is investment in creating new technologies and production methods. In Topic 5.6, it raises the level of technology, which increases labor productivity and real GDP per capita, shifting LRAS and the PPC outward.

### Does R&D shift aggregate demand or aggregate supply?

Long-run aggregate supply. R&D improves technology and productivity, which increases the economy's full-employment output. (The actual spending on R&D counts as investment in the short run, but the growth effect is a rightward LRAS shift.)

### Is R&D the same as capital accumulation?

No. Capital accumulation adds more physical capital per worker and eventually hits diminishing returns. R&D improves technology itself, making all inputs more productive, which is why it's the better answer for sustainable growth.

### Why do patents matter for R&D in AP Macro?

Patents let innovators profit from their inventions, which creates the incentive to spend on R&D. If a country eliminates patent protection and inventions can be copied immediately, the incentive for R&D falls and technological progress slows. This exact scenario shows up in practice questions.

### Does more R&D guarantee economic growth?

Not automatically, but successful R&D that produces usable technology raises productivity and real GDP per capita. On the exam, treat R&D spending (or subsidies for it) as a cause of an upward shift in the aggregate production function and an outward shift of LRAS.

## Related Study Guides

- [5.6 Economic Growth](/ap-macro/unit-5/economic-growth/study-guide/JU2OeMV9C6KoasNunMEX)

## Structured Data

```json
{"@context":"https://schema.org","@graph":[{"@type":"LearningResource","@id":"https://fiveable.me/ap-macro/key-terms/research-and-development-r-d#resource","name":"Research and Development (R&D) — AP Macro Definition","url":"https://fiveable.me/ap-macro/key-terms/research-and-development-r-d","learningResourceType":"Concept explainer","educationalLevel":"AP® / High School","about":{"@id":"https://fiveable.me/ap-macro/key-terms/research-and-development-r-d#term"},"audience":{"@type":"EducationalAudience","educationalRole":"student"},"dateModified":"2026-06-11T05:27:23.691Z","isPartOf":{"@type":"Collection","name":"AP Macroeconomics Key Terms","url":"https://fiveable.me/ap-macro/key-terms"},"publisher":{"@type":"Organization","name":"Fiveable","url":"https://fiveable.me"}},{"@type":"DefinedTerm","@id":"https://fiveable.me/ap-macro/key-terms/research-and-development-r-d#term","name":"Research and Development (R&D)","description":"Research and Development (R&D) is investment in creating new technology and innovation, which raises productivity (output per worker), shifts the long-run aggregate supply curve and PPC outward, and drives long-run growth in real GDP per capita (AP Macro Topic 5.6).","url":"https://fiveable.me/ap-macro/key-terms/research-and-development-r-d","inDefinedTermSet":{"@type":"DefinedTermSet","name":"AP Macroeconomics Key Terms","url":"https://fiveable.me/ap-macro/key-terms"}},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What is research and development (R&D) in AP Macro?","acceptedAnswer":{"@type":"Answer","text":"R&D is investment in creating new technologies and production methods. In Topic 5.6, it raises the level of technology, which increases labor productivity and real GDP per capita, shifting LRAS and the PPC outward."}},{"@type":"Question","name":"Does R&D shift aggregate demand or aggregate supply?","acceptedAnswer":{"@type":"Answer","text":"Long-run aggregate supply. R&D improves technology and productivity, which increases the economy's full-employment output. (The actual spending on R&D counts as investment in the short run, but the growth effect is a rightward LRAS shift.)"}},{"@type":"Question","name":"Is R&D the same as capital accumulation?","acceptedAnswer":{"@type":"Answer","text":"No. Capital accumulation adds more physical capital per worker and eventually hits diminishing returns. R&D improves technology itself, making all inputs more productive, which is why it's the better answer for sustainable growth."}},{"@type":"Question","name":"Why do patents matter for R&D in AP Macro?","acceptedAnswer":{"@type":"Answer","text":"Patents let innovators profit from their inventions, which creates the incentive to spend on R&D. If a country eliminates patent protection and inventions can be copied immediately, the incentive for R&D falls and technological progress slows. This exact scenario shows up in practice questions."}},{"@type":"Question","name":"Does more R&D guarantee economic growth?","acceptedAnswer":{"@type":"Answer","text":"Not automatically, but successful R&D that produces usable technology raises productivity and real GDP per capita. On the exam, treat R&D spending (or subsidies for it) as a cause of an upward shift in the aggregate production function and an outward shift of LRAS."}}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"AP Macroeconomics","item":"https://fiveable.me/ap-macro"},{"@type":"ListItem","position":2,"name":"Key Terms","item":"https://fiveable.me/ap-macro/key-terms"},{"@type":"ListItem","position":3,"name":"Unit 5","item":"https://fiveable.me/ap-macro/unit-5"},{"@type":"ListItem","position":4,"name":"Research and Development (R&D)"}]}]}
```