How to Write the Abstract of an Economics Paper

Abstracts in top economics journals follow a compressed version of the introduction formula. Evans identifies five ingredients of a good introduction (motivation, research question, empirical approach, detailed results, value-added). The abstract squeezes a subset of these into 4-7 sentences. The typical pattern:

1. (Often) Open directly with the research question and empirical approach
2. (Sometimes) Open with one sentence of motivation, then jump into the research question and empirical approach
3. (Almost always) Spend most of the space on a detailed discussion of the results
4. (Sometimes) Close with one sentence on the implications of the results

That is the whole formula. Notice what is NOT in this list: sentences dedicated to the existing literature. The abstract is not the place to review what other people have done. That belongs in the introduction.

Section-by-Section Guidance

Opening: Research Question + Approach (1-2 sentences)

The most common opening for abstracts in top journals is to jump straight into the research question, often incorporating the empirical design in the same sentence.

Pattern A - Lead with the research question and method combined:

• "We embed a field experiment in [context] to test whether [question]."
• "We use a randomized controlled trial to study [question] in [setting]."
• "This paper estimates the effect of X on Y using [identification strategy] in [setting]."

Pattern B - One sentence of motivation, then the question: Some papers open with a single sentence of motivation before pivoting to the research question. Evans found that no paper in his sample used more than one sentence for motivation in the abstract.

Examples of single-sentence motivations:

• "Despite massive investments in X, there is little evidence on its effectiveness."
• "Relative-pay concerns have potentially broad labor market implications."
• "The delivery of basic health products and services remains abysmal in many parts of the world where child mortality is high."

Each of these is exactly one sentence, and then the next sentence states the research question and design.

What to avoid:

• Do NOT spend multiple sentences on motivation. One is the maximum.
• Do NOT dedicate sentences to the existing literature. Papers in lower-ranked journals are more likely to do this, and it wastes precious space.
• Do NOT be vague about what you actually do. The reader should know the question and the method from the first 1-2 sentences.

Results: The Heart of the Abstract (2-4 sentences)

On average, top-journal abstracts devote at least half their sentences (about 54 percent in Evans' sample) to describing results. This is where the abstract does its real work.

Be specific. About half of top-journal abstracts include specific point estimates. Even those that do not still go into substantial detail. "We find a positive effect" is not enough. "We find a 25 percent decrease in child malnutrition" is the standard to aim for.

Structure your results logically:

1. Main result first. State the headline finding.
2. Heterogeneity or nuance second. If there is an important qualification, subgroup difference, or surprising twist, this is where it goes.
3. Supporting detail or mechanism third. Additional results that reinforce the story or help explain the main finding.

Example of well-structured results (from Ashraf et al., 2020, AER):

• Sentence 1 (main result): Offering career opportunities attracts less prosocial applicants.
• Sentence 2 (nuance): However, the trade-off exists only at low levels of talent; marginal applicants in treatment are more talented and equally prosocial.
• Sentence 3 (downstream effects with a point estimate): These are hired and perform better at every step of the causal chain, including a 25 percent decrease in child malnutrition.

Three out of four sentences in that abstract are about results. That ratio is typical for top journals.

Closing: Implications (0-1 sentence)

Some abstracts close with a sentence about policy implications or broader significance. This is optional. If you include it, keep it to one sentence. If your results speak for themselves, you can skip it.

Length and Word Limits

Typical length: 4-7 sentences for papers in top journals. Shorter abstracts (4-5 sentences) and longer abstracts (6-8 sentences) follow the same basic structure, with longer ones simply having more room for results.

Journal word limits vary:

• AER: ~100 words (this is shorter than you think)
• Many journals: 150 words
• Some journals: up to 250 words
• Working papers: no formal limit, but keep it tight

Even when there is no word limit (as with working papers), resist the urge to write a long abstract. The discipline of compression forces clarity. If you cannot summarize your paper in 150 words, that may signal a problem with the paper itself, not just the abstract.

The Abstract Formula in Practice

Here is the formula laid out as a template:

For a 4-sentence abstract (tight, AER-style):

1. Research question + empirical approach (1 sentence)
2. Main result (1 sentence)
3. Key detail, heterogeneity, or mechanism (1 sentence)
4. Implication or additional result (1 sentence)

For a 6-sentence abstract (more room):

1. One sentence of motivation (optional)
2. Research question + empirical approach (1 sentence)
3. Main result (1 sentence)
4. Important nuance or heterogeneity (1 sentence)
5. Supporting result or mechanism (1 sentence)
6. Implication (1 sentence)

For a working paper abstract (7-8 sentences):

1. One sentence of motivation (optional)
2. Research question (1 sentence)
3. Empirical approach and data (1 sentence)
4. Main result with point estimate (1 sentence)
5. Heterogeneity or mechanism (1-2 sentences)
6. Robustness or additional findings (1 sentence)
7. Implication or policy relevance (1 sentence)

Common Mistakes (and How to Fix Them)

Checklist Before Finalizing

Use this checklist to audit a draft abstract:

• Can a reader identify the research question from the first 1-2 sentences?
• Is the empirical approach stated clearly?
• Are the main results reported with specific magnitudes or point estimates?
• Do results occupy at least half the abstract's sentences?
• Is there zero or at most one sentence of motivation?
• Are there zero sentences reviewing existing literature?
• Would a non-specialist economist understand the main contribution?
• Does it meet the target journal's word limit?
• Have you used simple, clear language?
• Did you write the abstract after finishing the rest of the paper (or at least revise it last)?

When Helping a User Draft an Abstract

When a user asks for help writing or revising an abstract, follow this workflow:

1. Ask for the key ingredients: What is the research question? What is the identification strategy? What are the 2-3 most important results (with magnitudes if available)? Is there a key policy implication?
2. Determine the length constraint: What journal are they targeting? What is the word limit? For working papers, suggest aiming for 100-150 words.
3. Draft using the formula: Open with question + approach (or one sentence of motivation first), then dedicate the majority of sentences to results, optionally close with implications.
4. Audit against the checklist: Especially check that results dominate, no literature is reviewed, and the language is accessible.
5. Iterate: Tighten phrasing, cut unnecessary words, ensure every sentence earns its place.

If the user provides an existing abstract, diagnose it against the formula. The most common problems are: too much motivation, literature review sentences that do not belong, vague results, and missing empirical approach. Flag these and suggest specific rewrites.

Key editing principle: Every word in the abstract competes with every other word. If a word does not help the reader understand what you did or what you found, cut it.

Relationship to the Introduction Skill

The abstract is a compressed version of the introduction. If the econ-intro-writing skill is also available, use both together. The introduction follows the full 7-part structure (motivation, question, approach, results, value-added, optional, roadmap). The abstract compresses this into 4-7 sentences, dropping the value-added/literature discussion and roadmap entirely, and keeping motivation to one sentence at most.

Think of it this way:

• Introduction: the full argument for why your paper matters and what it contributes (3-5 pages)
• Abstract: the elevator pitch (100-250 words)

The results in both should be consistent and specific. The abstract should never promise something the introduction does not deliver, and vice versa.

References

• David Evans, "How to Write the Abstract of Your Development Economics Paper," Center for Global Development, 2021. https://www.cgdev.org/blog/how-write-abstract-your-development-economics-paper
• Marc Bellemare, writing advice on abstracts and economics papers.
• Dowling et al., research on abstract readability and citations in Economics Letters.
• David Evans, "How to Write the Introduction of Your Development Economics Paper," Center for Global Development, 2020.