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- [Tyler] Once you master 
the economic way of thinking,

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you'll see the world 
in a very different way.

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Two fundamental economic concepts 
are everywhere you look --

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opportunity costs, and tradeoffs.

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Let's start with opportunity costs.

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At this busy coffee shop,

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opportunity costs lie 
behind every decision.

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Like for Jenny -- she's here 
for her third date with Adam.

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Was that a good decision?

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After all, economics is 
all about studying decisions.

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Making a good decision is 
about comparing the benefits

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of that decision to the costs.

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The obvious costs for this date

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for Jenny were the Uber ride
she paid for to get here,

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and her grande chai tea latte
with whole milk.

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But what's missing?

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Her opportunity cost.

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Opportunity cost means the value 
of the next best alternative.

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For instance, instead of going
on her third date with Adam,

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Jenny could've been binge watching
her favorite tv show.

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She might've been 
on a first date instead,

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with Roman.

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Or she might've been 
having breakfast

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with her very sweet sister.

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Let's say her next best option

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would've been 
breakfast with her sister.

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Does the benefit 
of this third date with Adam

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outweigh the opportunity cost?

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It might seem strange 
to think this way about romance,

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and it doesn't mean it's 
about calculating every decision

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to the last penny.

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Nonetheless, Jenny's time, 
attention and energy --

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those are scarce.

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And if she doesn't consider 
the alternatives at all,

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she might be wasting 
parts of her life.

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There's another 
fundamental related concept

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from economics -- tradeoffs.

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Take these sprinklers 
in the ceiling of the coffee shop,

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foe example.

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Adding sprinklers can 
make it safer during a fire,

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but they also can cost 
a lot of money to install.

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How much cheaper would 
the coffee be without them?

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In a world of scarce resources,
one typically has to choose.

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There's a tradeoff, 
safer buildings cost more.