A top lawyer can type 100 words/minute. Their assistant types 60 words/minute. Should the lawyer do their own typing?

💭 How to Think About This

COMPARATIVE ADVANTAGE: Even if you're better at EVERYTHING, you should specialize in what you're RELATIVELY best at and trade for the rest. Why? Because time spent typing is time NOT spent lawyering. Focus on where your opportunity cost is lowest.

Should the faster-typing lawyer do their own typing?

The lawyer has ABSOLUTE advantage in typing (100 > 60). But that's not the right question. The question is: What's the COST of the lawyer typing? When a $500/hour lawyer types for an hour, they're NOT doing $500/hour legal work. Typing costs them $500 in foregone lawyering!

LAWYER'S opportunity cost of typing: $500/hour in legal fees. ASSISTANT'S opportunity cost of typing: maybe $25/hour. So each hour of lawyer-typing "costs" society $500 of legal work. Each hour of assistant-typing "costs" $25 of assistant work. The assistant should type—even though they're slower!

COMPARATIVE ADVANTAGE isn't about who's better—it's about who gives up LESS. The lawyer's time is so valuable in law that EVERYTHING else has high opportunity cost. The assistant's comparative advantage is typing—not because they're good at it, but because their opportunity cost is lower.

Even if the lawyer is better at EVERYTHING, the assistant still has comparative advantage in SOMETHING—whatever has the lowest relative opportunity cost. This is why trade benefits both parties: focus on your comparative advantage, trade for the rest. Total output increases.

Being "faster" (absolute advantage) doesn't mean you should do it. What matters is opportunity cost. A $500/hour lawyer typing costs $500 of foregone legal work—way more than the assistant's time is worth.

• Absolute advantage: who's faster/better

• Comparative advantage: who gives up LESS

• Lawyer's typing cost: $500/hr in legal work

• Assistant's typing cost: $25/hr

• Everyone has comparative advantage somewhere

Correct! Even though the lawyer is FASTER at typing, they shouldn't do it. When a $500/hour lawyer types, they're NOT doing $500/hour legal work. The assistant typing "costs" maybe $25/hour in foregone work. It's cheaper for the firm if the lawyer lawyers and the assistant types.

This is COMPARATIVE ADVANTAGE. Not "who's better" (absolute) but "who gives up less" (comparative). The lawyer has absolute advantage in both typing AND law. But their COMPARATIVE advantage is law—that's where their opportunity cost advantage is greatest.

When both specialize by comparative advantage: • Lawyer does more legal work (high value) • Assistant does more typing (their relative strength) • Total output increases • Firm makes more money • Both can be paid more. This is why trade benefits BOTH parties, even when one is "better" at everything.

This applies everywhere: Don't do tasks you CAN do if your time creates more value elsewhere. Outsource, delegate, trade. Your comparative advantage might not be your best skill—it's where your opportunity cost is LOWEST relative to alternatives. Focus there; trade for the rest.

You understand comparative advantage! The question isn't "who's better?" but "who gives up less?" When the lawyer types, they sacrifice $500/hour legal work. When the assistant types, they sacrifice $25/hour. Both benefit from specialization.

• Comparative advantage: lowest opportunity cost

• Lawyer's advantage is law (higher value work)

• Assistant's advantage is typing (lower opportunity cost)

• Specialization increases total output

• Focus on YOUR comparative advantage, trade for rest

Context matters! But the KEY factor is: What's the opportunity cost? If the lawyer has no clients waiting, typing might be fine. But if they could be billing $500/hour instead, then spending time typing costs $500 in foregone revenue—far more than paying an assistant.

The general principle: COMPARATIVE ADVANTAGE. Not "who's better" but "who gives up less." The lawyer has ABSOLUTE advantage (faster typing). But COMPARATIVE advantage is about opportunity cost. When law pays $500/hour, typing has huge opportunity cost for the lawyer, small for the assistant.

This insight explains why trade benefits EVERYONE—even the "worse" party. The assistant isn't as good at anything as the lawyer. But they STILL have comparative advantage in something—wherever their opportunity cost is lowest. Both gain from specializing and trading.

In general: Don't do tasks you CAN do if your time creates more value elsewhere. The lawyer should usually let the assistant type. Your comparative advantage is where your opportunity cost is lowest—focus there, trade for the rest. Total output increases for everyone.

Good to look for context! The key factor is opportunity cost. If the lawyer can bill $500/hour for legal work, their time typing costs $500—way more than the assistant's time. Generally, specialize by comparative advantage.

• Key factor: opportunity cost of each person's time

• Comparative advantage: who gives up less

• Both benefit from specialization

• Even "worse" party has comparative advantage somewhere

• Focus on YOUR advantage, trade for the rest

🤔 Which thinking lens(es) did you use?

Select all the lenses you used:

Learn more about the 7 Thinking Lenses →

👨‍👩‍👧 For Parents & Teachers

🌱 A Small Everyday Story

"I can clean faster than my brother."
"Should you always clean then?"
"I guess?"
"What are you MUCH faster at?"
"Homework. Way faster."
"So time you clean is time NOT doing homework.
Maybe he cleans, you tutor him—trade."
"So I focus on what I'm MOST better at?"
"That's comparative advantage."

See more guidance →

🧠 Thinking habits this builds:

Thinking in opportunity costs
Understanding specialization benefits
Recognizing trade as mutually beneficial
Finding unique contribution areas

🌿 Behaviors you may notice (and reinforce):

"What's my comparative advantage here?"
Willingness to delegate and trade
Not trying to do everything alone
Seeing trade as win-win

How to reinforce: When dividing tasks, discuss relative strengths and opportunity costs. Help them see that even if they're "better" at everything, focusing on their BIGGEST advantage and trading makes everyone better off.

🔄 When ideas are still forming:

Some learners may think comparative advantage means everyone is "equal"—it doesn't. Others may not understand why the "better" person benefits. Work through numerical examples to show total output increasing.

Helpful response: "Comparative advantage isn't about being equal—it's about opportunity cost. When the best coder spends time on design, they're NOT coding. That's expensive! Better to code and pay someone else to design."

🔬 If you want to go deeper:

Study David Ricardo's original formulation
Work through numerical trade examples
Explore applications in career choice

Key concepts (for adults): Comparative advantage, absolute advantage, opportunity cost, specialization, gains from trade, division of labor.

A top lawyer can type 100 words/minute. Their assistant types 60 words/minute. Should the lawyer do their own typing?

Compare All Perspectives

⌨️ "Yes—they're faster"

⚖️ "No—focus on law"

🤔 "It depends"

🤔 Which thinking lens(es) did you use?