A rough mathematical model for calculating IT technology book gains
It is well known that there is a significant feature of the technical books of the IT class, that is, expensive. It can often be seen that someone discusses a book online is not expensive. Some people say it is expensive, but it is not expensive to say that it is not expensive than it can give it. So who said, I think everyone is "the public saying public and reasonable, her woman is reasonable", but most of the time is based on individual subjective views. Here, I tried to give a simple mathematical model to explain whether IT technology book is really expensive, or not expensive. But I didn't give conclusions in the text, all everything just gave you a thinking inspiration.
Since it is a benefit, of course, costs and rewards are involved. To this end, we have the following formula:
Revenue (I) = Return (R) - Cost (C) (Equation 1.)
Below we will discuss the calculation methods of discussing costs and returns.
Let's talk about costs. Speaking of costs, some people may think that the cost of IT technology book is not its price? In fact, if the price can determine the cost, then I can think that I use it to choose a book, reading the time is what is nothing to do (anyway, they will not be included in the cost. In this way, why don't I use these time and do something else, such as chatting with friends, eat, play cards, etc. In addition, a book is also a problem after purchasing, and some people may packet it very carefully. When you don't look, put it in your own decorative bookshelf, and clean up your accumulation from time to time. The dust and the mites in the bookshelf, etc., we can also put these in the cost of books, but in fact for most people, these costs are very small, generally can be ignored, Therefore, we will neglect them in the heart of the people (in fact, there is also a reason why the author is less calculated in order to lazy. In this way, we can get the cost of the book is
Cost (C) = Book price (P) (Selection reading time) (T) × Reader's income (S) (Equation 2.)
In the above formula, the book price is generally fixed, so we can imagine cost (c) to become a fixed function of the selection / reading time (T) and reader time income (s). But this is not scientific, because most of the readers are only an ordinary student without fixed income, since they have no income, we can think that for students, there is
Cost (c) = Book price (P) (Equation 2.1)
?
I think we should be the kind of decision that cannot be made up! To this end, we must modify our formula 2., let it be the same as the performance of the office worker and the student family. To this end, we have formula 2.2:
Cost (C) = Fixed Cost (SC) Floating Cost (DC) (Equation 2.2):
Fixed cost (SC) = book price (P) (Equation 2.2.1)
Floating cost (DC) = (selected book reading time) (T) × reader time income (S) (office worker)
= (Selected book reading time) (T) × reader time of education (S ') (student)
(Equation 2.2.2)
In Equation 2.2.2, I assume that the students are reasonable for students to make a small fee income (as for if it is really reasonable, I don't know).
From Equation 2.2.1 and 2.2.2, the book price P and unit time income s (or unit time of time, miscellaneous fees S ') are fixed for a reader, so how much T is in cost. It is very important. But we also have to see that because of the students, the amount of time for the unit is usually not too high (at least compared to the time income of the office workers), so for them, the book price actually accounts for it. A large part of the total cost C.
OK, now we have a formula for calculating costs (although it is not perfect, I think it is enough to use it to deal with most of the problems). Now let's start thinking about the reward.
For IT technology books, it is actually very difficult to count its return. For office workers and students, we can "one go to colleagues", suppose
R = The technology in this book can give you the duration of your revenue (T ') ×
During this time, you have mastered the unit revenue (DS) that reflects the value of knowledge.
The above equation seems to be very reasonable, but in fact, because your income growth is a sudden growth in a certain time, not a gradual steady rise process; The view, your other behavior can be quantified by economics, so that we can quantify the time we used to study to the income (this is because some people think that it is worth reading those time. And friends who have dinked with friends are not worth it). For the sake of simplicity, we deemed the income growth of income growth as a constant DS 'that remains unchanged in a certain period of time.
R = RS RM RO (RS: Because of the income; RM: Because readers feel comfortable in their own hearts; RO: Other income, such as writing articles, etc.)
RS = T '× DS'
RM = T "× S (or s": You are willing to do other things for reading, usually there will be T "== T), for office workers, RS should be in the benefits The biggest piece, because DS 'is generally, the relative to the large environment of the industry will not change, so t''s length is very important. Relative student, RM and RO bring It is more important, and the specific details are different from person.
Ok, I wrote the above, I don't want to make a conclusion. Leave this conclusion to all friends to discuss the completion (usually, I am a lazy person, the lazy people have a way to be lazy)
