The Basics of Game Theory

Upon hearing the term "game theory", you may picture tense chess games or elaborate military strategies. But game theory doesn't only apply to economists and mathematicians; it is a tool we all use, often without realizing it.

Fundamentally, game theory revolves around understanding human decision-making in contexts where the results hinge not merely on one's own decisions, but also on the actions of others. Think of it as the science of strategy, used everywhere from politics to personal finance.

In economics, a "game" describes any circumstance with two or more participants making interdependent decisions. The "participants" can be individuals, firms, governments, or anyone with a stake.

Each player attempts to increase their payoff. Whether it’s money, reputation, or joy. The game is defined by its rules, which tell us what each player can and can’t do, and which show us the consequences of each possible outcome.

Alright, picture this: two criminals are arrested and questioned separately. If they both keep their mouths shut? Eh, they’ll each get slapped behind bars only for a short time. But if one decides to snitch while the other keeps quiet, the traitor walks free while the other one gets slammed with a brutal sentence. Now, if they both betray each other? Well, neither’s walking out happy—they both land somewhere in the middle, serving not the worst time, but definitely not a slap on the wrist.

Here’s the kicker: the so-called “smart move” is to screw your buddy over, but when both of the players do that, they’re both worse off than if they’d just kept their mouths shut. Kinda wild, right? Shows you how individual decision-making doesn't lead to the best outcome. You see this mess everywhere—business deals gone sideways, countries arguing over climate stuff, you name it. Welcome to the weird world of game theory.

Game theory? Oh, it’s everywhere in microeconomics – especially in understanding how businesses behave. Take pricing wars—two rival companies eyeballing each other like, “Are you gonna drop your prices?, "If you do, I might have to, too.” Their decisions affect one another.

Now, look at oligopolies. Think airlines—there’s only a handful of big players, and they’re all obsessed with what the others are plotting. Since only a few firms dominate the market, they constantly consider their rivals’ moves before making their own.

And don’t even get me started on negotiations and contracts. Understanding strategic behavior helps businesses avoid getting played—or play smarter.

Game theory isn’t just for boardrooms, and you don't even need a business to use game theory. Picture this: you’re out with friends, the bill hits the table, and now it’s that awkward moment—do you split it evenly, or do you pay for just your sad salad and one drink? Kinda depends on the vibe, right? Like, what do your friends usually do, and are they gonna side-eye you if you go rogue and pay your exact amount? Boom—game theory, right there, just hiding in your dinner plans. Your decision will depend upon others around you and what they might think.

Oh, and salary negotiations? Total mind game. Go in too soft and just nod at the first offer, you’re probably leaving money on the table. But if you push too hard, the employer might walk away. Knowing your power and anticipating the other side's reaction is the strategy here.

Final Thoughts 

Game theory tells us that economics isn’t just about money but is about people as well. It's about understanding the psychology behind decision-making and how your decision depends on, and affects others' decisions.

By just knowing the basics of game theory, you'll gain a sharper understanding of not just markets and money, but also relationships, risk, and reason.

Editor: Tamari (Tako) Mtiulishvili