Recommended resources
The freely available resources this lesson will direct you to.
Hello! Welcome to your first lesson in economics.
Over the next few months, we will build a strong foundation in both microeconomics and macroeconomics, starting right here with the fundamental principles that guide all economic analysis. This first module, "Foundations of Economic Thinking," will equip you with the essential tools to start seeing the world through an economist's eyes.
Today, we'll begin with the most basic problem in economics, which is the starting point for everything else we will study. Our goal is to define scarcity, opportunity cost, and trade-offs using real-world examples. Understanding these three interconnected concepts is the key to unlocking the economic way of thinking.
1. Scarcity: The Core of Economics
At its heart, economics is the study of how people make choices under constraints. The fundamental constraint we all face—individuals, companies, and governments alike—is scarcity.
Scarcity is the condition of having unlimited human wants and needs in a world of limited resources. We can't have everything we want, so we are forced to choose.
To get a clear introduction to this idea, please watch the first minute of the following video.
Scarcity, Trade-offs, and Cost/Benefit Analysis
This video from the Professor Dave Explains channel provides a concise overview of scarcity and how it forces us to make choices.
Watch the segment from the beginning until 01:02. Focus on how the video defines scarcity by contrasting boundless human wants with finite resources.
As the video explains, this tension between unlimited wants and limited resources applies to everything from your daily schedule (limited time) and your budget (limited money) to the global economy (limited natural resources, labor, and capital). Your work as an IT analyst likely provides daily examples of scarcity, such as project budgets, server capacity, or the available hours of your development team.
2. Trade-offs: The Consequence of Scarcity
Because scarcity forces us to choose, every decision we make involves a trade-off. A trade-off is the act of giving up one benefit to gain another. You can't do two things at once, so you must trade one for the other.
Let's see how trade-offs are a direct result of scarcity.
Opportunity Cost and Tradeoffs
This video from Marginal Revolution University uses the example of safety features in a coffee shop to illustrate the concept of a trade-off in a business and policy context.
Watch the section from 02:04 to 04:18. Pay attention to how the decision to add safety sprinklers involves trading off higher costs (and potentially more expensive coffee or fewer new businesses) for increased safety.
The video's example of safety sprinklers illustrates a classic societal trade-off: safety vs. cost. Other common examples include:
- Individuals: A student who spends an evening studying for an exam trades off that time against leisure activities like watching a movie.
- Governments: A government that increases spending on healthcare may have to decrease spending on infrastructure. This is often referred to as the "guns vs. butter" trade-off, symbolizing the choice between defense and social spending.
3. Opportunity Cost: The True Cost of a Decision
When we make a trade-off, we give something up. But how do we measure the cost of that choice? In economics, the true cost of any decision is its opportunity cost.
Opportunity cost is the value of the single next-best alternative that you forgo when you make a choice. It’s not just about the money you spend (that's the explicit cost); it’s about the opportunity you lost.
To understand this crucial distinction, let's turn back to the Marginal Revolution University video.
Opportunity Cost and Tradeoffs
This segment introduces opportunity cost with a very clear and relatable example of choosing how to spend one's time.
Watch from the beginning to 02:04. Notice how Jenny's opportunity cost isn't all the other things she could be doing, but specifically the next best thing: having breakfast with her sister.
Exploring Real-World Examples
Opportunity cost is everywhere. The following article provides excellent examples, from everyday purchases to major life decisions.
Real-Life Examples of Opportunity Cost | St. Louis Fed
This article from the St. Louis Fed, titled 'Real-Life Examples of Opportunity Cost', breaks down the concept with practical scenarios.
Please read the first three sections, from the beginning down to the heading 'Why the Rush?'. Focus on how it distinguishes between 'seen' explicit costs and 'unseen' opportunity costs.
As the article highlights, even a small decision like buying a smoothie has an opportunity cost—the value of what you could have done with that money instead. For larger decisions, the opportunity costs become even more significant.
The infographic below provides a great summary of the key ideas related to opportunity cost.
Opportunity Cost in Your Field
Given your background as an IT analyst, you might find it interesting to see how this concept applies directly to software development. Decisions about what features to build, what technologies to use, and how to allocate developer time are all governed by opportunity cost.
Opportunity Cost for developers — or how I stopped worrying about ...
This article, 'Opportunity Cost for developers', provides a detailed case study of how ignoring opportunity cost can lead to wasted resources in a technical project.
Please read the introduction and the sections titled 'Opportunity cost in development' and 'Opportunity cost in time and development'. Focus on how the team's decision to build a generic, reusable form had a high opportunity cost, measured in the seven weeks of lead developer time that could have been spent on other valuable features.
This case study is a powerful example of opportunity cost in action. The cost of building the "future-proof" feature wasn't just the eight weeks of development time; it was the value of all the other features and bug fixes that the lead developer could have completed in that time.
Conclusion
In this lesson, we've laid the groundwork for all of economics by exploring three foundational concepts:
- Scarcity: Our wants are unlimited, but our resources are finite. This is the fundamental economic problem.
- Trade-offs: Because of scarcity, every choice requires us to give something up to get something else.
- Opportunity Cost: The true cost of any decision is the value of the next-best alternative we had to forgo. It's the "road not taken."
Thinking in terms of opportunity cost is one of the most powerful tools you will gain from studying economics. It forces you to look beyond the obvious, explicit costs and consider the implicit, hidden opportunities you are giving up.
In our next lesson, we will build on this foundation by asking: now that we know we must choose, how do we choose? We will introduce the concept of marginal analysis, which is the process of breaking down decisions into small, incremental steps to find the optimal choice.