1. Examples of Networks and Data
2. Network Statistics, Visualization and Graphs
• Elements of Graph Theory
• Graphs and Matrices
• Bipartite Graphs
• Core-periphery Networks and Nested Split Graphs
• Network Statistics: Average path length, clustering and assortativity
• Centrality in Networks: Degree, eigenvector, Katz-Bonacich centrality and Google's Page Rank
• Network Visualization: Force-directed, circular and layered layout
3. Econometrics of Interactions in Networks
• Spatial Autoregressive (SAR) Model
• Linear Quadratic Utility
• Endogeneity of the Spatial Lag
• Two-Stage Least Squares (2SLS)
• Maximum Likelihood Estimation (MLE)
• Identification Issues
– Correlated Effects, Sorting and Selection
– Endogenous Link Formation
• Multiple Spatial Weight Matrices
• Spatial Panel Data
4. Econometrics of Network Formation
• Exponential Random Graph Model (ERGM)
• Conditional Edge-Independence
– Erdös-Rényi Random Graph
– Logistic Regression
– Unobservable Characteristics (beta-model)
– Tetrad Logit Estimator
• Random Utility Model
• Maximum Likelihood Estimation (MLE)
• Markov Chain Monte Carlo
– Gibbs Sampling
– Metropolis Hastings Algorithm
• Stochastic Block Model (SBM)
• Temporal ERGM
5. Joint Estimation of Outcomes and Network Formation
5.1. Coevolution of Networks and Behaviour: An application to R&D collaboration networks
• Structural Model: Utility and the potential game
• Estimation
– Computational Problem and the Exchange Algorithm
– Double Metropolis-Hastings (DMH) Algorithm
– Unobserved Heterogeneity
• Empirical Illustration: R&D collaborations
5.2. Network Formation with Multiple Activities: An application to team production and co-authorship networks
• Bipartite Network, Production Function, and Utility
• Equilibrium Characterization and Line Graphs
• Estimation with Endogenous Matching
• Empirical Illustration: Co-authorship networks
6. Spatial Modelling Approach for Dynamic Network Formation and Interactions
• Spatial Dynamic Panel Data (SDPD) Model
• A General Dynamic Network Formation Model
• Combining SDPD with the Network Formation Model: Joint likelihood function
• An Empirical Application to Peer Effects in Academic Performance
7. Big Data Meets Networks
• The Digital Layer: How innovative firms relate on the Web
• Automated Robot for Generic Universal Scraping (ARGUS)
• Input, Interface and Output of ARGUS
• Sectoral Hyperlink Network
• Hyperlink Types