I'm an active duty Army officer who studies statistical models for social network data observed over time. Shoot me questions and collaboration opportunities at josh at lospi.net ( Facebook | LinkedIn | Quora | Twitter )

Some selected work

Extensions for Stochastic Actor Oriented Models:

Lospinoso, J.A. and Snijders, T.A.B. "Ideas on Modeling Social Network Dynamics with Relational Event Data". Presentation given at the RSiena Users Meeting in Oxford, UK on November 30, 2010.

Lospinoso, J.A. and Snijders, T.A.B. "Joint Inference on Informant Accuracy and Social Network Dynamics". Presentation given at the RSiena Users Meeting in Oxford, UK on November 30, 2010.

Studies of time heterogeneity and goodness of fit in Stochastic Actor Oriented Models:

Lospinoso, J.A. and Snijders, T.A.B. "Goodness of fit for Social Network Dynamics". Presentation given at the Sunbelt XXXI: St. Pete's Beach, Florida on February 12, 2011.

Lospinoso, J.A., Schweinberger, M., Snijders, T.A.B, and Ripley, R.M. "Assessing and Accounting for Time Heterogeneity in Stochastic Actor Oriented Models". Advances in Data Analysis and Classification. Special Issue on Social Networks, 10-30. 2010.

Lospinoso, J.A. "Assessing and Accounting for Time Heterogeneity in Stochastic Actor Oriented Models". Presentation given at the 6th UK Social Networks Conference 2010: Manchester, UK.

Lospinoso, J.A. "Testing and Modeling Time Heterogeneity in Longitudinal Studies of Social Networks: A Tutorial in RSiena". Working paper.

Lospinoso, J.A., and Satchell, D.J. "Smoking Behavior and Friendship Formation: The Importance of Time Heterogeneity in Studying Social Network Dynamics". Proceedings on the Hawaii International Conference on System Sciences (HICSS) 2011: Koloa, Kauai, Hawaii, USA.

Lospinoso, J.A., and Satchell, D.J. "Smoking Behavior and Friendship Formation: The Importance of Time Heterogeneity in Studying Social Network Dynamics". Presentation given at the Hawaii International Conference on System Sciences (HICSS) 2011: Koloa, Kauai, Hawaii, USA.

External links

The RSiena webpages, where you may download the R package RSiena and access the implementations discussed in the above presentations:

Siena Homepage maintained by Professor Tom Snijders. Contains much relevant information about Siena, including datasets, publications, and tutorials.

RForge RSiena Homepage maintained by Dr. Ruth Ripley. Contains the most up to date version of RSiena.

United States Military Academy Network Science Center maintained by Mrs. Tish Torgerson. Contains information about the USMA Network Science Center, where I am a research assistant.