Production Possibilities Frontier (PPF) - Introduction and Productive Efficiency - Online Tutor, Practice Problems & Exam Prep

The production possibilities frontier (PPF) illustrates the maximum output combinations of two goods, such as thin crust pizzas and robots, given fixed resources and technology. Points on the PPF indicate productive efficiency, while those inside represent attainable but inefficient production levels. Points outside the curve are unattainable. Understanding these concepts helps analyze economic efficiency and consumer preferences, emphasizing the importance of resource allocation in achieving desired outputs.

Understanding the PPF

In this video, I'm going to introduce you to an economic model called the production possibilities frontier. So here we have a graph with the production possibilities frontier on it. We're going to call it PPF for short. Some books call it the PPC, but I'm going to use PPF throughout these videos. So the PPF is a graph showing the combinations of output an economy can produce with the available resources, right? So this is about what kind of mix of products we can produce with what we have, alright?

We're going to make some assumptions when we deal with this graph. We've got two goods; these are going to be the production outputs of our society. In this example, we've got the economy of Clutchtopia here creating both thin-crust pizzas and robots. That is what we produce in Clutchtopia: thin-crust pizza and robots. We're going to assume we've got a fixed amount of resources, right? This involves scarcity; we don't have unlimited resources, we have a fixed amount, and for our example, it's not going to grow or shrink. We've got a certain amount of resources, a certain amount of labor, a certain amount of land, human capital, right? So it's a certain amount of the inputs into the process. And our last assumption is that we've got fixed technology as well. Okay? So nothing's going to be changing in this society. That's the idea. Alright.

So let's go to the graph. We've got Clutchtopia, producing thin-crust pizzas and robots. So along this line is what we call the PPF. This blue line on the graph, that is Clutchtopia's production possibilities frontier, and when we look at this graph, we're going to look at a couple of key points here. So if we look at the point way up here on the graph where we're producing 10,000 robots up there, right? We've got 10,000 robots but no pizza. So in Clutchtopia, if we put all our efforts into robot production, we could have 10,000 robots. Now let's say Clutchtopia put all their efforts into pizza production; for thin crust pizzas, we could produce 4,000,000 pizzas, but 0 robots if we were at this point down here on the graph, but we can also produce some mix of the two. Right? We can have some robots and some pizza. But we know that if we have 4,000,000 pizzas, we're not going to be able to have any robots. Right? So 4,000,000 is the maximum amount of pizzas with no robots, but let's say we're at a point like right here. Right? We can have a mix of, say, 3,000,000 pizzas and 4,000 robots there, right? So anywhere along that line is still part of the mix we can attain. Right?

We've got two things to think about. We've got attainability, right? Is it attainable or unattainable, this level of production? So what we're going to say is that anywhere inside and on the line is attainable. It's a mix of production that we can attain. Right? So what I'm saying here is yes, we could be on the line here at 3,000,000 pizzas and 4,000 robots, but it's entirely possible that we could be at this point right here in blue where we're producing 1,000,000 pizzas and 2,000 robots. Right? That is still an attainable amount of production. Compare that to an unattainable amount. So I'm going to write "attainable" here inside of yellow. Attainable. And for unattainable, I'm going to use this light blue. So, anything out here, outside the graph, right, anything outside the graph is going to be unattainable. It's an amount of production that we cannot achieve with our current resources, our current technology. Right?

So, let me show you an example here. If I were to put a point out here, say, at this point, in blue, now we're saying we want 3,000,000 pizzas and 7,000 robots, and that's just unattainable because it's outside of the curve. So outside of the curve of the PPF, we are going to call it unattainable. Okay. So inside is attainable, outside is unattainable, and one more thing I want to talk to you about real quick is productive efficiency and allocative efficiency. So we call something productively efficient if you'll scroll down a little bit, we've got here productive efficiency is producing at any point on the PPF. Any point on the PPF is productively efficient. That means we are getting the most we can with our current situation, right? So we're saying we're efficient if we're anywhere along the curve. So this point right here, if we go back to the curve, I'm going to start putting some points in black. All these points are productively efficient anywhere here along the graph, right. That's all productively efficient on the graph. Okay. And allocative efficiency, if you see right there below productive efficiency, that's just a little more subjective. This is about whether you're producing the correct mix based on consumer preferences. So that's the idea, do the consumers of Clutchtopia want 3,000,000 pizzas, or do they want 1,000,000 pizzas? It all depends on the consumer choices, and that's the allocative efficiency that you see, but on the graph, it's easy to tell if you're being productively efficient. Productive efficiency is reached by being on the graph. Cool? So let's continue, and we'll do a practice.

PPF - Attainable and Efficient

Alright. So let's go ahead and do this example, that uses the graph at the top of this page. Assume Clutchetopia features the curve illustrated above. Mark the following levels of production as attainable or unattainable. If production is attainable, mark the level of production as efficient or inefficient. Okay. So we've got different levels of production here, and let's go ahead and just start with the first one here. We're saying that Clutchetopia should produce 5,000,000 pizzas and 3,000 robots. Okay. 5,000,000 pizzas and 3,000 robots. Let's go up to our graph, and let's find that point on the graph. So we're going to go to 5,000,000 pizzas here and 3,000 robots, and if we find that point, that puts us right here right? And this is outside of the graph, right? Outside of the curve, so this point is unattainable, right? Based on our previous discussion, if it's outside of the curve, it is unattainable. So our discussion about efficiency doesn't matter because it's unattainable, so there's no way it could be inefficient or efficient, because we can't even attain it. So we're just going to put an NA here. Okay. Let's try the next one. 1,000,000 pizzas and 9,000 robots. So back on our graph, let's find that point. 1,000,000 pizzas 9,000 robots. So here's 1,000,000 pizzas. If we go up from 1,000,000 and we go to 9 on the robots, and we're going to find that point. And that point lies right there at 9,000 robots and 1,000,000 pizzas. We know that if it's on or inside the curve, it is attainable, and then if it's on the curve, we know that it's productively efficient. So in this case, we have both an attainable and efficient amount because we're on the curve. We are getting the most that we can with our resources at that production mix. So it's productively efficient. Let's try the next one. 4,000,000 pizzas and 0 robots. So let's go to our graph and let's find that point. So we've got 4,000,000 pizzas and 0 robots, this point is already on here in green, let me highlight it in red here. So 4,000,000 pizzas and 0 robots. We're right here down on the x-axis. So what do you think? Is this point attainable or unattainable? Well, it looks kind of weird because it's on the axis. We're not producing any robots, but we are still on the curve. So we've got 4,000,000 pizzas and or excuse me 4,000,000 pizzas and 0 robots. That is an attainable amount and it's efficient because it is on the curve. So we've got an attainable efficient amount here. Let's try the next one, 3,000,000 pizzas and 3,000 robots. So now we've got 3,000,000 pizzas and 3,000 robots. We are going to go up from 3,000,000 pizzas, over from 3,000 robots, and end up at this red point right here. Notice we're not on the curve. We're just inside of it. We didn't reach that perfect production efficiency. We are just inside. So, yes, we can attain this level of production, but it's not efficient because we could be producing a little bit more robots or a little bit more pizza with our current resources and technology. So we have an attainable amount, but it is inefficient. So we're going to put an I there for inefficient. Alright, let's try the last one. 2,000,000 pizzas and 7,000 robots. So here we go, 2,000,000 pizzas right here and let's find 7,000. 7 will be right up here. So this red dot that I'm adding now is going to be at 2,007,000 notice that lies right on our curve, so again we've reached productive efficiency. Oh, had a weird scroll there. Give me one second to get back to where we were, and oh boy. There we go. We've got an attainable efficient amount. Alright? So that last one is attainable and efficient. Cool, guys. Hope you got that. Let's move on to the next video.

A point inside the production possibilities frontier is

• A. Attainable, but inefficient
• B. Efficient, but unattainable
• C. Efficient and attainable
• D. Inefficient and unattainable

The economy of Clutchtopia can be summarized as seen on the PPF below. Consider the production mixes denoted alongside the graph. Mark the levels of production as Attainable (A) or Unattainable (U). If production is attainable, mark the level of production as Efficient (E) or Inefficient (I).

Alright, so let's try this practice problem here. The economy of Clutchtopia can be summarized as seen below. Consider the production mixes denoted alongside the graph. Mark the levels of production as attainable or unattainable, and if the production is attainable, mark the level of production as efficient or inefficient. Alright, so remember that attainable is anywhere on or inside the curve, and I'm going to label that in yellow here. Yellow, this is attainable. In here is attainable. That includes on the line is also attainable, and here in blue this is going to be all the unattainable. We can't go beyond the curve; that is the maximum that we can produce in any of these combinations. So yeah, all of this is going to be unattainable here. Alright. So this will help us when we are finding where these points lie. The blue will be the unattainable area, yellow is attainable. And remember, for efficiency, it is going to be anywhere that is directly on the curve, so it has to be on the line of the curve here to be efficient. Okay? So let's go ahead and try this first one. We've got 3,000,000 butter and 6,000 guns. So let's see what we get at that combination. So first, we've got, and I'm going to label these all a, b, c, d, e, f so you see where they end up on the graph. Alright. So the first one, 3,000,000 butter and 6,000 guns. That's going to put us at this point right here. Unfortunately, we cannot produce at that point. That's point a. It is in our unattainable region, right. This is beyond our production possibilities, so we are going to write unattainable here. And since it's unattainable, there's no way it could be efficient, so that's not applicable. Let's try b. 2,000,000 butter and 5,000 guns. So at 2,000,000 butter, let's go up to 5,000 guns. That's this point right here. That's point b. Again, we are beyond the production possibilities, so we again have an unattainable mix. How about 0 butter and 6,000 guns? So now we've got 0 butter which is right here, right, and 6,000 guns. That's this point up here. So now what do you think? We are on the line now, right, this is on the line, the very edge of the line, so when we are on the line, we know that that is attainable, and when it's on the line, it's also efficient. So we have reached productive efficiency. We're not wasting anything here. We got an attainable efficient amount. Let's try the next one. 1,000,000 butter and 4,000 guns. So 1,000,000 butter, 4,000 guns. That puts us at this point right here, point d. Let me write that a little better. Point d. So what do you think? At point d, is it attainable? Yes. It's in the yellow region. It's inside the curve, but it's not on the line, so it's inefficient, right? Attainable but inefficient, and it's inefficient because we could have, at this point, produced a little bit more butter or a little bit more guns with our current resources. Next one, 2,000,000 butter and 3,000 guns. So we've got 2,000,000 butter, 3,000 guns. That puts us at this point right here, point e, and that is on the line, right? So on the line is attainable and it's efficient. How about 0 butter and 0 guns? So that puts us down here. They didn't do anything. They were feeling real lazy. They didn't produce anything. So that's their point f down in the bottom-left corner. Now what do you think? Is this attainable? Yeah, it's attainable. Everyone can just not do anything, and we cannot produce anything. So it is attainable, but I'm gonna go ahead and guess that that is inefficient as well. Right? We could have produced more of either one. Right? A lot more of either one. So for that one, we have attainable and inefficient. Cool. Let's move on.

Here’s what students ask on this topic:

What is the Production Possibilities Frontier (PPF) in economics?

The Production Possibilities Frontier (PPF) is a graphical representation that shows the maximum possible output combinations of two goods that an economy can produce given fixed resources and technology. It illustrates the trade-offs between the two goods, demonstrating the concept of opportunity cost. Points on the PPF indicate productive efficiency, meaning the economy is utilizing all its resources optimally. Points inside the PPF are attainable but inefficient, as they indicate underutilization of resources. Points outside the PPF are unattainable with the current resources and technology. Understanding the PPF helps in analyzing economic efficiency and resource allocation.

What does it mean for a point to be on the PPF curve?

A point on the PPF curve represents a combination of two goods that an economy can produce using all its available resources efficiently. This means the economy is operating at its maximum productive efficiency, with no resources being wasted. For example, if Clutchtopia is producing 3,000,000 pizzas and 4,000 robots, and this point lies on the PPF, it indicates that Clutchtopia is making the best use of its resources. Any movement along the PPF involves a trade-off, where increasing the production of one good requires reducing the production of the other due to limited resources.

What is the difference between productive efficiency and allocative efficiency?

Productive efficiency occurs when an economy is producing at any point on the PPF, meaning it is utilizing all its resources optimally without any waste. Allocative efficiency, on the other hand, is more subjective and refers to producing the right mix of goods and services that align with consumer preferences. While productive efficiency ensures maximum output, allocative efficiency ensures that the output mix is what consumers desire. For example, in Clutchtopia, producing 3,000,000 pizzas and 4,000 robots might be productively efficient, but whether this mix is allocatively efficient depends on consumer demand for pizzas versus robots.

What does a point inside the PPF curve indicate?

A point inside the PPF curve indicates that the economy is not utilizing all its resources efficiently, leading to underproduction. This situation is known as productive inefficiency. For instance, if Clutchtopia is producing 1,000,000 pizzas and 2,000 robots, and this point lies inside the PPF, it means that Clutchtopia could produce more of either or both goods without needing additional resources. This underutilization could be due to factors like unemployment, inefficient resource allocation, or technological inefficiencies.

What does a point outside the PPF curve represent?

A point outside the PPF curve represents an unattainable level of production with the current resources and technology. For example, if Clutchtopia aims to produce 5,000,000 pizzas and 3,000 robots, and this point lies outside the PPF, it indicates that the economy does not have sufficient resources or technology to achieve this production level. Such a point is beyond the economy's production capacity, highlighting the constraints imposed by limited resources and existing technology.