Patrick
Movies
Stanford
TU Wien
Nachhilfe
An n-Sector Migration Simulation
It's based on a Two-Sector Migration Model inspired by Harris and Todaro and applied Agent Based Simulation aligned to Axtell’s Emergence of Firms to build "An n-Sector Migration Simulation".
Here is the abstract:
"Workers, considering costs of migration, tend to migrate to sectors where they expect higher wages. In revers, firms trying to increase profits, migrate to sectors with lower wages. The result of their combined movement determins wages in each sector. This Agent Based Simulation applies an inductive behavior models with various strategies for wage expectations, and yields patterns of migration in an n-sector scenario."
Here are some results:
Download: http://www.derbaum.com/n-sector-migration.pdf
Labels: Economics, Patrick, TU
Wal-Mart's Data Warehouse
From the Abstract:
Wal-Mart is an exceptional company. As professor Strassmann
[Stra06] says, "Mal-Mart is a an information system integrator. Not a merchandising company. They are just selling goods as a by-product. Fundamentally when you look at the value added by Wal-Mart, it is knowledge assets and how they are able to establish a global information network."
Wal-Mart's data warehouse, the biggest in the world, enabled it to become a very successful company.
As part of my research for this paper I read Data Warehousing: Using the Wal-Mart Model. by Paul Westerman. The book has great insights on Wal-Mart's data warehouse design and some very useful guidelines on designing software for cooperation.
Human Migration and Migration of Firms
My first dismal approach to Human Migration and Migration of Firms based on
- Inductive Reasoning and Bounded Rationality (The El Farol Problem)
by Arthur - Migration, Unemployment and Development: A Two-Sector Analysis
by Harris, Todaro (1970).
Workers, considering migration costs, will change location if expected wages are higher. The same counts for firms. Trying to increase profits, firms switch location if they expect wages to be lower.
I try to simulate both. Human migration and migration of firms. Both influencing wages in their respective location.
The focus of this work is on the effects of migration costs. I expect high cost of migration to increase wage separation across different locations. While moderate migration costs should over time reduce wage separation.
Human Migration in an Expanding European Union
I just finished a work on migration in Europe. It's a summary of three papers on the subject.
- Migration, Unemployment and Development: A Two-Sector Analysis by Harris, Todaro
- Potential Migration from Central and Eastern Europe into the EU-15 - An Update by Brücker, Alavarez-Plata, Siliverstovs
- Growth and Immigration Scenarios: Turkey-EU by Erzan, Kuzubas, Yildiz
Certainly good material for my master thesis.
CORBA, RMI
Kerberos Functionality Diagram
A PDF of Kerberos Functionality Diagram
Labels: TU
WS 2005
- Makroökonomische Simulationen
- Neuere Methoden formaler Modellierung
- Betriebsökonometrie
- Semistrukturierte Daten
- Verteilte Systeme + Lab
- Kryptographie + SE
- Data Warehousing 1
Labels: TU
Visualization of Hierarchies
Given a folder this app draws a tree in OpenGL showing the hierarchy of the subfolders.
ScreenShot of infovis - 3D view
This app was written for a lecture in Informationsvisualisierung.
On Deregulation
In a Nutshell: Deregulation in the labor market yields
lower wages and possible higher unemployment in the short run. Truly a
negative effect for workers. However, in the long run those higher profits for
firms will attract new firms to enter the market.
Increased competition will drive the number of products, prices and
employment up. This should bring real wages back to the level before
deregulation.
An intertemporal tradeoff indeed.
A Definition of Deregulation from The Economist:
Cutting red tape. The process of removing legal or quasi-legal
restrictions on the amount of competition, the sorts of business
done, or the prices charged within a particular industry. Dur-
ing the last two decades of the 20th century, many governments
committed to the free market pursued policies of liberalisation
based on substantial amounts of deregulation hand-in-hand with
the privatisation of industries owned by the state. The aim was
to decrease the role of government in the economy and to in-
crease competition. Even so, red tape is alive and well. In the
United States, with some 60 federal agencies issuing more than
1,800 rules a year, in 1998 the Code of Federal Regulations was
more than 130,000 pages thick. However, not all regulation is
necessarily bad. According to estimates by the American Office
of Management and Budget, the annual cost of these rules was
$289 billion, but the annual benefits were $298 billion.
Stundenplan
| Those weekly lectures... | ...are mixed up with some seminars. |
Labels: TU
Shift Scheduling
Operational Research ("OR"), also known as Operations Research or Management Science ("OR/MS") looks at an organisation's operations and uses mathematical or computer models, or other analytical approaches, to find better ways of doing them.
The OR Society
Ending Online Auctions
It's about the rules of ending an online auction and how it influences the bidders behaver.
Quicky
- As shown at derbaum.com, I brought back some fun movie clips: Wiesenski, Caribbean and The Secret Ingredient.
- During this summer (June 20th till Aug 17th) I'm going back to Stanford to study Physics.
- That's why I give up my apartment in Marokkanergasse. It was good place, but now I have to move on.
- Currently I'm working on an LP on scheduling, which I may inlcude in future version of Caltella. In short, this should find an optimal schedule for one or more person, regarding a certain task, with the goal to maximise spare time.
- Looking at the above task, the field of Operation Research seems very interesting to me. A field where I can combine my interst in math, economics and computer science.
Labels: Economics, movies, Patrick, Stanford, TU
Business modeling
This semester (SS04) I'm going into modeling of business processes. I got to read some quite interesting papers from this field and most of my courses are related with this topic.
If I try to loosely bring together some of my courses I could say that:
We analyze a business in ORG, then we model it in UM and finally we optimize it in OR.
Caltella Screen Shots
Read more about Caltella in this paper.
Labels: TU
Caltella API
Labels: TU
Caltella beta just ahead
Caltella's goal is to exchange meetings in a platform independent envirorment. It is based on accepted standards like:
- vCalendar to import/export calendars
- zeroconf.org (Rendezvous) for ad-hoc local networks
- JXTA to create a world wide P2P system
Labels: TU
Patrick goes for Wirtschaftsinformatik
Since I attended the HTL Schellinggasse I was equally interested in Computer Science as well as Economics and Business. Now it seems so obvious to study Wirtschaftsinformatik, which is basically a combined major of both.
Looking up a dictionary I found two translations for Wirtschaftsinformatik.
- computer science in economics
- business informatics
Interesting fact about the Wirtschaftsinformatik is that it's thought at the Vienna University of Technology and the Vienna University.
Wirtschaftsinformatik is separated in a Bachelor of Economic Science (6 Semester) and a Master of Business Administration (3 Semester).
Labels: TU