2,033 Matching Annotations
  1. Oct 2019

    Annotators

    1. Individual optimisation solved problem

      Student asked: Could something like this be on the final exam?

      Answer: Yes

      Student asked: Would you be able to 'avoid it by choosing a different question with less maths?'

      Answer: Possibly/probably, but it's better to learn how to do it ... in case you don't like the other question either.

    2. ‘people buy less when the price rises, all else equal’.

      I should say, 'when it rises because of a shift in the supply curve or because a monopoly seller chooses to raise prices'

      Really the principle is that in aggregate people are willing to buy fewer units at this higher price.

    1. f*h'(r)

      index 'h' here rather than 'n+h' because f*(r) does not take the (n-vector) x as an argument (it sets these optimally, conditional on the r-vector and computes the output).

    1. Goals of this problem set: Re-acquaintance with mathematical approaches to Economics (e.g., simultaneous equations, graphing functions) Revising the supply and demand model and its implications, applying this to real-world problems, considering empirical approaches Understanding the logic of ‘difficult’ multiple choice questions (assessment tips) Discussing and writing a coherent response to applied Economics questions

      It goes beyond this actually; I need to update the 'goals' section

    1. Note: The lecturing ‘slides’ are posted contemporaneously to each lecture, but there is no need to look at them – this web-book (‘handout’ is king). OK, fine… the link to the slides is HERE, but don’t look at them. (If you do you will need to press ‘o’ to see the navigation map.

      Those were behind the VLE -- the github hosted slides are

      HERE ... etc

  2. Sep 2019
    1. Alfred Marshall argued that a good’s price must equal both the cost to produce and the value (to consumers) of the last unit produced and consumed.

      added some material below (orange) to give insight

    2. With ‘single crossing’ (a fancy condition you can ignore in this module) there is a unique price where Qs(p)=Qd(p)Qs(p)=Qd(p)Q^s(p)=Q^d(p), and a unique quantity where the last unit’s value to the consumer equals its cost to produce.

      I will elaborate on this a bit

    1. Not ‘output’ – ‘nets provided’ nor ‘paintings purchased’ (Total or marginal) impact per dollar = output per dollar ××\times impact per output

      Ben Grodeck: I like the definition of Impact. It might be worth mentioning overhead costs and impact aren’t necessarily correlated (or at least not 100%).

      DR: I would hope this is well-known in this audience, but you are probably right that it's worth mentioning. 'Overhead ratio' should not be (and does not seem to be) positively correlated to either the 'marginal impact of $1 donated on output' nor to 'marginal impact of $1 donated on ultimate outcomes'

    2. Little giving to the most effective charities ‘Innumerate empathy’: key barrier to promoting effective giving?

      Ben Grodeck: Is empathy innumerate? I thought as numbers got larger, people’s empathy actually decreased. (I see you mention this research later on in the presentation)

  3. Aug 2019
    1. When Pandoc converts Markdown to another output format, it uses a template under the hood. The template is a plain-text file that contains some variables of the form $variable$. These variables will be replaced by their values generated by Pandoc. Below is a very brief template for HTML output:

      where do we find the default (gitbook) template to be able to tweak it?

  4. Jul 2019
    1. The book is written in RMarkdown with bookdown. It is automatically rebuilt from source by travis. R4DS is a collaborative effort and many people have contributed fixes and improvements via pull request.

      anyone other r4ds_slackers using bookdown?

    1. This tool is designed to help you inform your marketing, improve retention of your donors and ultimately increase your income. It means you can target your donors in a really timely way, when you are most at risk of losing them and when they are most likely to donate, maximising your impact whilst still adhering to The Fundraising Regulations.

      Henrik can you see these notes?