Running Gear

How nice it is to live in a city where the department stores are open on Sundays. Today I went out and bought some new running gear:

Socks I got a pair of running socks from Falke; the kind with a L and R wowen in the fabric on the left and right sock, respectively. They are called RU 4 and cost 100 DKR (German firm, don’t know where they are produced).

Base Layer I also needed a base layer and found a nice one from Helly/Hansen to 250 DKR. It’s called Stripe Crew and is available in a lot of colours; I got mine in red (made in Portugal).

Wind Breaker The number one on my wish-list was a wind breaker. I did not want to spend too much on the thing, but since I’m a bit of a gear freak I ended up spending 700 DKR on a Addidas Response made of 100 percent polyester (in Indonesia).

It was all tested today in Aarhus where the temperature is about 1 degree celcius and it was raining. I ran 45 minutes, and it felt warm, dry and very comfortable. The socks made my 2 year old Addidas trainers feel like new!

Update 4.12.05 For my birthday, even though it is not for another 10 days, I got new trainers from my parents. A pair of Asics something-Gel. Tested them this evening for 65 minutes and it felt like I was flying. I feel stupid that I have waited for so long to get a pair of new shoes.

USA vil lukke kurdisk tv-station i Danmark

dr.dk › Nyheder › Indland › USA vil lukke kurdisk tv-station i Danmark

Hvor lang tid kan det tage at undersøge, hvorvidt en tv-station sender ulovlige tv-programmer og støtter terrorvirksomhed? Tjah, jeg vil da gerne have at Danmark opretholder en høj standard for retssikkerhed, så lad os blæse på Tyrkerne og Amerikanerne, og vente på hvad politiets undersøgelser viser.

Economics and Tina

What do an economist do as the first thing on a Saturday morning? Try to explain to his girlfriend the difference between “economies of scale” and “marginal product.” Why? I have absolutely no idea. Here is the summary:

If you occationally find yourself in doubt of the difference between economies of scale and the marginal product it is convenient to think about it in the following way:

A brewery produce beers (Y) as a function of the quantity of labour (L), raw materials (M), and machinery (C) put into the production process (F).

Mathematically: Y = F(L, M, C)

We don’t know the exact specification of the production function; consider it a business secret. If the brewery adds a percent more of both L, M, and C, and it then produces a percent more output, we say that the production function exhibits constant return to scale (CRS); formally, the F() exhibits CRS if

F(aL, aM, aC) = a F(L, M, C) = a Y.

If the firm adds one unit more raw materials (M), and expects to get more output of beer, we say that F() exhibits positive marginal product with respect to M. If the company is really producing close to the limit, we could expect that that it would not produce more output even though it added more raw materials; that is, the marginal product with respect to M is approaching zero.

Formally, if the partial derivative of F() wrt. M is strictly positive, we say that F() exhibits positive marginal product wrt. M. If the second partial derivative of F() wrt. K is strictly negative we say that F() exhibits deminishing marginal product wrt. M.

Hence, the economies of scale is about how much more we get out of a production process if all factors are increased by the same amont, where the marginal product says if we can expect to get more or less from the production process by using a bit more of one specific factor, holding everything else constant (ceteris paribus).

Danmarks Statistik – Solgte biografbilletter

Danmarks Statistik – Solgte biografbilletter

Tænk sig! Danmarks Statistik laver også statistik over antallet af solgte biografbilletter til danske og udenlandske film. Egentlig er det ikke nogen nyhed, for statistikken bliver jævnligt refereret i medierne. Imidlertid er der mange interessante ting at lære ud fra statistikken.

F.eks. at Danmarks mindst populære biograffilm hedder `Dilemma’ og havde premiere i 1962. Det par som drog afsted til premieren mÃ¥ have kedet sig bravt, for de var nemlig helt og aldeles alene. De var de eneste i Danmark som købte en billet til filmen!

Mon der er fejl i statistikken, og mon det er muligt at finde det par (eller de to enlige) som var i biffen og se den film?

Her er lidt mere (u)nyttig informatioin om filmen: Dilemma (1962/II)

Tip: Jazz Online

If you like jazz music, Jazz Online is definitely a place for you. Here you can browse album “hot picks” from a variety of artists, read reviews, look at album artwork and preview music. Actually, to term it “a preview” is a bit of an understatement: You can preview most of an album in Quicktime! There is also a link to the music on iTMS, so you are only a credit card away from owning the music.

If you stop by I’ll recommend that you to listen to Mulatos Remixe by Omar Sosa.

An Instance of Murphys Law

Why is it that when you think you are doing alright, a new problem always appear? Is is Murphys Law?

I’m working on a large dataset on a remote connection from Ã…rhus University to Statistics Denmark in Copenhagen. This creates some practical limitations. I had planned to finish a matching analysis on friday but then I found out that the Unix I was working on did not have the necessary software for the analysis.

It took me 4 days to get from the point where I realized I needed some extra software, to the day where the software was on the machine.

…and people are wondering why DSB’s new trains are delayed.