Figure 1.3 represents the effect that technological change has on the production curve.Improved technology causes the production curve to shift. But where to? If the same amount of capital goods are produced, the curve will shift out only. If both consumer and capital good production are increased, the the curve will move diagonally upwards and if only the capital goods increase, the curve will move up in a straight line.
Figure 1.4 shows which icrease of good production (capital or consumer) will cause the most growth. Increased production of capital goods allow for more economic growth than increased production of consumer goods. This is because increased capital goods cause the curve to shift out more over time.
Opportunity cost is the sacrifice of one item for the aquisition of another. Let's look at an example. You may wish to put a tidy sum of money away for future growth. All of my past and current invested money has been low risk, low growth. As I'm in school while working and still trying to build my finances, it wouldn't be wise for me to throw any extra money into high risk investments right away. I like collecting my principle investments and savings plus a small interest, guarenteed at the end of a set term. Simply put, I can't afford to lose much of the money I'm putting away. The opportunity cost of these guarenteed savings is the potential for higher yields through a riskier investment. I lose out on the chance to make big money in a short period of time through speculative stocks. I can't have both high returns and guarentee of returns. I must sacrifice one or the other at this point in time. If you are a student, surely you will understand. Living on my own is great, but I must work full time to afford this luxury. In order to advance my current career, I must also aquire higher education. Working full time comes at the opportunity cost of being done school quicker. I can't get a degree in four years and work full time. This is scarcity (of time) in it's simplest form.