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The Solow Model and Ideas
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The Solow Model and Ideas

Super Simple Solow Model: The Role of Ideas in Economic Growth

Overview of the Super Simple Solow Model

  • The discussion begins with a recap of the Super Simple Solow Model, focusing on capital accumulation dynamics and how savings rates affect growth.
  • A key takeaway is that the model predicts an eventual steady state with no growth, setting the stage for introducing ideas as a crucial variable.

The Impact of Ideas on Growth

  • Ideas are posited as essential for continued economic growth; better ideas enhance productivity by yielding more output from existing inputs like capital and labor.
  • Historical examples, such as Henry Ford's innovative combinations from various industries, illustrate how novel ideas can significantly boost productivity across sectors.

Mechanism of Idea Integration into Capital Accumulation

  • Ideas act as multipliers for output; an increase in productivity (e.g., doubling from 1 to 2) shifts the output curve upward, leading to increased investment.
  • This cycle creates a feedback loop where improved ideas lead to higher output and investment, which further accelerates capital accumulation.

Continuous Growth Through Idea Generation

  • If idea generation is constant, it results in ongoing upward shifts in both output and investment curves, preventing stagnation at the steady state.
  • The model combines two types of growth: catching up through capital accumulation and cutting-edge growth driven by idea accumulation.

Further Exploration and Future Topics

  • For deeper insights into the Solow Model, resources like "Modern Principles" textbook and Development Economics course are recommended.
Playlists: Economics [Intermediate] Pt.1 Principles of Economics: Macroeconomics Unit 3: Growth, Capital Accumulation, and the Economics of Ideas
Video description

More Solow Model from MRU’s Macro course: the power of ideas in driving economic growth. A deeper dive into what helps spur the creation of ideas. According to our previous videos in this section, the Solow model seems to predict that we’ll always end up in a steady state with no economic growth. But, the Solow model still has one variable unaccounted for: ideas. So, can ideas keep us growing? Ideas do one thing really well: they give us more bang for our buck. This means we get more output for the same inputs of capital and labor. Ideas are a way of upping our productivity, increasing output per worker across different industries. Just how much extra output are we talking about? Well, imagine changing the A variable of the Solow model from 1 to 2. This means a doubling of our productivity. This shifts the entire output curve upward. When output doubles, so does investment. Once investment comes in faster than depreciation, we end up accumulating capital once again.Thus, the economy keeps growing, which further boosts output. Now, think of what would happen, if ideas continually improved. With each improvement, ideas would keep shifting the output curve upward, which will continually increase investment as well, and allow us to keep to the left of the steady state. And when we stay to the left, that means we keep growing. What all this means is, growth at the cutting edge is determined by two things. First, it's determined by how fast new ideas are formed, and second, by how much those ideas increase productivity. You now have a complete picture of our simple Solow model. It's a model that accounts for catching up growth, due to capital accumulation, and cutting edge growth, due to the buildup of ideas. Now, since ideas foster growth at the cutting edge, we're left with the question that naturally follows: what factors help spur the accumulation of ideas? That's what we'll discuss in the next video, so hang tight! Subscribe for new videos every Tuesday! http://bit.ly/1Rib5V8 Macroeconomics Course: http://bit.ly/1R1PL5x Development Economics Course: http://bit.ly/1OcVp4z Next video: http://bit.ly/24mMhqH Office Hours: http://bit.ly/25M2w1i Help us caption & translate this video! http://amara.org/v/ITee/