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  There's got to be somepart of our mind that came out our nature. I know that because I'm in a twin, an identical twin. And so when it came to writing my PhD dissertation. I thought to myself if there's any part of human behavior that has a biological origin. It must be our patterns of love and marriage. Because as Darwin would have said, if you have four  children and I have no  children, You live on  and I die out.  The game of love matters.  And so you would think there would have been selection for all kinds of behaviors that would enable you to fall in love with somebody, form a partnership and raise your babies as a team. And so that's why I started to study love, And you know people will often think,  "Well she studied love because had a bad relationship in high school" Well, nobody gets out of love alive. We all have problems with love. But that did not stimulate me to study romantic love. It was simply because I was an identical twin. And I w...

  Basically we write down the functions are invertible. And we use them both ways, it's the bottom line. It doesn't we're really writing down equilibrium in Q and P. It doesn't really matter what X and Y is. We're really just writing down an equilibrium relationship.  It's just the convention is to put Q on the X- axis. Even though the convention will sometimes write demand curves with P on the left hand side the graphic convention will never change but  How I write the curves might change How I write the equations might change You use opportunity cost to justify why demand sloping? Great question. Okay, let's go through it. That's exactly the kind of question I want to hear this semester. Is does someone want to take a crack at it? Anyone want to explain? and speak up  If the price is higher to in order to get that rose, you had to give up more because the price represents sort of like your opportunity. Right, for the opportunity cost of any good in the...

  Drunkards the word occurs, "He will forgive even the drunkards" .  What is it about that scene?  Why does cats think that's my favorite scene? besides knowing what the original title of the book is.. What's so important about that scene?  It's kind of it's about forgiveness and that's kind of what like the strong four throughout the book is like to forgive himself or to be forgiven.   To be forgiven ? not I think not so much to forgive himself but to be... to be forgiven (..) good other things?  other thoughts about this?  Well it also kind of  contrasts with Raskolnikov because he does believe that he's worth in some way and Marmeladov is saying like that he's not worthy. And that's why he'll like get forgiveness but Raskolnikov hasn't really realize that he's not worthy. That's good because I mean somebody said right raskolnikov's theories he's still very much wetted to his theory in fact he goes to Siberia, even wet...

  So let's say this mathematically.  At a point like A you  have your marginal utility for pizza is the derivative of the utility function with respect  to the number of slices of pizza. It's the marginal utility. It's derivative of the utility function. So it's dU/dp, which is equal to 0.5 times C over square root  of P times C.  MUp = dU/dp = 0.5 x c /  And at point A we had  two cookies and five pizzas. At point A,  P was five C was two  that's true of point A.  So we can evaluate the marginal utility.  dU/dp, which equals 0.5 times C over square root of P times C.  So that's 1 over the square root of 10.  That's the marginal utility of the next slice of pizza.  The next slice of pizza makes you 1 over square root of 10 happy.  Once again, that number is meaningless.  So we only care about it in ratios. So we need the ratio. So let's do the marginal utility of cookies.  That's dU/dc, which is 0...

  So if it's not survival of the fittest individual and it's not survival of the fittest group, then what is it? The Beginning Life Well, to explain that, I want to take you on a little journey, all the way back to the beginnings of the Earth.  Where we are now, there is nothing. Well, not really nothing, but nothing interesting. There are only simple things, like these blobs. This one might be a carbon dioxide molecule, or it might be cyanide. We don't know for sure what they are, but we do know that these compounds are very simple. So for now, they'll just be blobs floating around our void. In fact, much of what we'll encounter along our journey here are just hypotheses. A lot of Earth's early history is still a mystery, so keep that in mind.  Now, every so often, our blobs get a surplus of energy, maybe from a ray of UV light or a nearby hot source. This is the first major upgrade to our void, excess energy, as it allows our blobs to interact with each other....

  So if natural selection is all about selfish individuals, why do we observe so much altruism in nature?  The survival is of the species that can adapt.  I think generally the species.  For the survival of the species.  So it's the survival of the species.  Okay. Yeah, you're right. But survival of the fittest species or the fittest group also doesn't work.  I mean, think about what you need for natural selection to occur. You need something that replicates itself many times over, creating copies, and then you need a pruning process, whereby some of those copies get eliminated and some thrive to go on and create more copies. The problem with groups or species is that they don’t typically make copies of themselves.  So you almost never get copies of groups fighting other copies of groups to see which groups win out. So if it's not survival of the fittest individual and it's not survival of the fittest group, then what is it? The Beginning Life Wel...

  I saw an interesting ads last night. I t was just I was watching basketball game. I saw something for Taco Bells was saying that you can get  their plac the PlayStation a new Playstation system before it even comes out on the market but through a contest  so that's a way that people someone has it and now there's so much hypee on like your friend who has it based on  you and not the rest of the Market's not available to them so it's like a coveted thing. Right, Absolutely and it's interesting that they picked a gaming  console.  So I think that's very relevant to what we're talking about definitely. That's what their  target market is because whoever eats for that fast food is more like I guess teenagers and who plays games, Teen. Yeah  it could be,  Absolutely we need to understand all of that. We need to understand the consumer profile. W ho is our target market and we say who is our target market yes part of that is is what we're trying ...