Economists use concepts and methods from network science to understand a complex, global, and interconnected world. In network thinking, the fundamental unit of analysis consists of the relationships among interacting units rather than the individual characteristics of these units. The ability to analyze the particular way relationships are organized - i.e. the network structure - is crucial in understanding complex phenomena in nature and society. Network thinking and models are also the very essence of transformative technologies such as AI & blockchain. In this course, we discuss how a network perspective can help us to re-think key issues in economics. More specifically, this course will introduce concepts and methods to map and measure relationships and flows between people, firms, cities, economic sectors, communities, or any other element of a complex economic system. We will discuss how the structure of a system influences its overall performance, why the relative position in a network conditions the access to critical resources, and how relationships are created and dissolved over time. This course consists of lectures combined with computer exercises and online tutorials.
Pierre-Alexandre Balland -
p.balland@uu.nl
Matté
Hartog - Matte_Hartog@hks.harvard.edu
The overall grade for the class will be based on an individual (mid-term) exam (50%) and a report of a collective research project (50%).
The report of the research project involves the collection, examination, and analysis of economic network data followed by a short essay reviewing empirical and theoretical arguments. Groups of 2-3 students will focus on a specific economic question and use network thinking and network analysis tools to answer it. Make sure not to apply blindly the tools you will learn in the class but rather tell a story with your network data. You will be guided along your projects in group meetings. The outcome of your project should be (1) a slidedeck (10 slides max), (2) a 2000-word long paper (excluding references) and (3) the R scripts you used to produce the network graphs and compute the network metrics. This material should be submitted to this Dropbox folder by November 5 at the latest (week 44 is free so you can finalize the project).
One of the most important parts of this class is your network project. You will learn many new skills, that can lead to more advanced research or even a business opportunity. But this project is also challenging, from truly applying network thinking and collecting the data, to presenting your finding in a clear and structured way. These group meetings are milestones to make sure that you stay on schedule and do not get lost in the project complexity. Please submit your work in progress 48h before your weekly group meetings to this folder.
There is no class reader. The weekly readings are provided on this web-page and slides/videos will be regularly uploaded here. All articles listed should be considered mandatory reading. Additional online materials might be assigned throughout the quarter.
| Week | Day | Date | Time | Location | Activity | Lecturer |
|---|---|---|---|---|---|---|
| 36 | Thursday | 07/09 | 15:15-17:00 | MIN - 2.02 | Lecture 1 | Balland |
| 36 | - | - | - | Online (video) | Lab 1 | Balland |
| 36 | Thursday | 07/09 | 17:15-19:00 | MIN - 2.02 | Lecture 2 | Balland |
| 36 | - | - | - | Online (video) | Lab 2 | Balland |
| 37 | Thursday | 14/09 | 15:15-17:00 | MIN - 2.01 | Lecture 3 | Balland |
| 37 | - | - | - | Online (video) | Lab 3 | Balland |
| 38 | - | - | - | - | Ideation time | - |
| 39 | Thursday | 28/09 | 15:15-17:00 | MIN - 2.01 | Lecture 4 | Balland |
| 39 | - | - | - | Online (video) | Lab 4 | Balland |
| 40 | Thursday | 05/10 | 15:15-19:00 | Online | Meeting | Hartog |
| 41 | Thursday | 12/10 | 13:30-14:30 | EDUC-GAMMA | Exam | Balland |
| 42 | Thursday | 19/10 | 15:15-19:00 | Online | Meeting | Hartog |
| 43 | Thursday | 26/10 | 15:15-19:00 | Online | Meeting | Hartog |
| 44 | - | - | - | - | Project | - |
Topics covered
- Overview of class
- Introduction to network thinking
- Networks in natural sciences, social sciences, and business
- Economics and networks
References
- Barabasi, A. L. (2012) The network takeover, Nature Physics 8 (1),
14-16 PDF
- Ter Wal, A. L., and Boschma, R. A. (2009) Applying social network
analysis in economic geography: framing some key analytic issues. The
Annals of Regional Science 43 (3): 739-756 PDF
- Hanneman, R.A. and Riddle, M. (2005) Introduction to social network
methods. Riverside, CA: University of California, Riverside - Chapter 1
PDF
- An application of ONA by Deloitte PDF
Topics covered
- Network data collection (research projects)
- Software for network analysis
- Introduction to R and RStudio
- Basic programming skills
References
- http://www.statmethods.net
- https://pballand.wixsite.com/balland/install-r
Topics covered
- Graphs and matrices
- Key concepts: nodes, links, structure
- Random networks
- Small worlds
- Growing networks
- Key structural patterns of real-world networks
- Principles to keep in mind when working with your own network
data
- Scope and milestones of the project
References
- Barabasi, A. L. (2016) Network Science. Cambridge, England: Cambridge
University Press - Chapter 2 PDF
- Hanneman, R.A. and Riddle, M. (2005) Introduction to social network
methods. Riverside, CA: University of California, Riverside - Chapters 2
PDF,
3 PDF,
5 PDF
& 7 PDF
- Barabasi, A. L., and Albert, R. (1999) Emergence of scaling in random
networks, Science 286 (5439): 509-512 PDF
- Watts, D. J., and Strogatz, S. H. (1998) Collective dynamics of
‘small-world’ networks, Nature 393 (6684): 440-442 PDF
Topics covered
- Basic matrix algebra VIDEO
2.1
- Network data management VIDEO
2.2
- Creating an igraph object (from raw data) VIDEO 2.3
References
- Balland, P.A. (2017) Economic Geography in R: Introduction to the
EconGeo Package, Papers in Evolutionary Economic Geography, 17 (09):
1-75 PDF
- Csardi G, Nepusz T: The igraph software package for complex network
research, InterJournal, Complex Systems 1695. 2006 PDF
Topics covered
- Why positions of actors/nodes in a network matter
- Degree, betweenness, and closeness centrality
- Strength of weak ties, structural holes, and network closure
References
- Granovetter, M. (1985) Economic action and social structure: The
problem of embeddedness, American journal of sociology 91 (3): 481-510
PDF
- Burt, R. S. (2004) Structural holes and good ideas. American journal
of sociology 110 (2): 349-399 PDF
- Hanneman, R.A. and Riddle, M. (2005) Introduction to social network
methods. Riverside, CA: University of California, Riverside - Chapters 9
PDF
& 10 PDF
Topics covered
- Structural analysis of global networks VIDEO
3.1
- Computing different forms of centrality VIDEO 3.2
- Mastering the igraph R package
Topics covered
- Endogenous mechanisms of growth in economic systems
- Mapping economic systems as 2-mode networks
- Relatedness and evolution
- Predicting changes in economic systems
- An application to European innovation policy
References
- Hidalgo, C., Balland, P.A., Boschma, R., Delgado, M., Feldman, M.,
Frenken, K., Glaeser, E., He, C., Kogler, D., Morrison, A., Neffke, F.,
Rigby, D., Stern, S., Zheng, S., and Zhu, S. (2018) The Principle of
Relatedness, Proceedings of the 20th International Conference on Complex
Systems, forthcoming [PDF]
- Hidalgo, C. A., Klinger, B., Barabasi, A. L., & Hausmann, R.
(2007). The product space conditions the development of nations.
Science, 317(5837), 482-487 PDF
- Balland, P.A., Boschma, R., Crespo, J. and Rigby, D. (2019) Smart
Specialization policy in the EU: Relatedness, Knowledge Complexity and
Regional Diversification, Regional Studies, forthcoming PDF
- INET Webinar How
Regions Can Re-invent Themselves by Pierre-Alexandre Balland
Topics covered
- Computing relatedness between (economic) activities VIDEO 4.1
- Relatedness density and predicting entry (diversification) VIDEO 4.2
- Visualization of complex networks VIDEO 4.3
Additional reading
Students are not required to purchase any books to follow this course.
If you are interested in additional reading, these three books make an
excellent introduction to the world of network science and network
analysis:
Useful websites