Message from the Director, Mark Lubell

The mission of the Center for Environmental Policy and Behavior (CEPB) is scientific analysis of the interactions among policy institutions, human behavior, and political decisions in the context of environmental and natural resource conflicts. Through developing and testing theoretical models from social science, CEPB seeks to derive practical lessons that can be used to improve environmental policy.

  • strict warning: Non-static method view::load() should not be called statically in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/views.module on line 1118.
  • strict warning: Declaration of views_handler_field::query() should be compatible with views_handler::query($group_by = false) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_field.inc on line 0.
  • strict warning: Declaration of views_handler_field_user::init() should be compatible with views_handler_field::init(&$view, $options) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/modules/user/views_handler_field_user.inc on line 50.
  • strict warning: Declaration of views_handler_sort::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_sort.inc on line 0.
  • strict warning: Declaration of views_handler_sort::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_sort.inc on line 0.
  • strict warning: Declaration of views_handler_sort::query() should be compatible with views_handler::query($group_by = false) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_sort.inc on line 0.
  • strict warning: Declaration of views_handler_filter::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_filter.inc on line 0.
  • strict warning: Declaration of views_handler_filter::query() should be compatible with views_handler::query($group_by = false) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_filter.inc on line 0.
  • strict warning: Declaration of views_handler_area::query() should be compatible with views_handler::query($group_by = false) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_area.inc on line 0.
  • strict warning: Declaration of views_handler_area_text::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_area_text.inc on line 0.
  • strict warning: Declaration of views_plugin_query::options_submit() should be compatible with views_plugin::options_submit($form, &$form_state) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/plugins/views_plugin_query.inc on line 0.
  • strict warning: Declaration of views_plugin_row::options_validate() should be compatible with views_plugin::options_validate(&$form, &$form_state) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/plugins/views_plugin_row.inc on line 0.
  • strict warning: Non-static method view::load() should not be called statically in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/views.module on line 1118.
  • strict warning: Declaration of views_handler_argument::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_argument.inc on line 0.
  • strict warning: Declaration of views_handler_argument::query() should be compatible with views_handler::query($group_by = false) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/handlers/views_handler_argument.inc on line 0.
  • strict warning: Declaration of views_plugin_argument_validate::options_submit() should be compatible with views_plugin::options_submit($form, &$form_state) in /opt/drupal6/environmentalpolicy.ucdavis.edu/modules/views/plugins/views_plugin_argument_validate.inc on line 0.

Tidyverse Tutorial

By Michael Levy - Posted on 17 October 2016

Last week, I gave an overview of bunch of tidyverse packages (tibble, dplyr, tidyr, ggplot, readr, purrr) to the Davis R-Users’ Group. Here is that talk (and since videos don’t display everywhere this blog is syndicated, here is the YouTube link).

I mention early in the talk that the github_markdown specification in the YAML header produces a conveniently GitHub-renderable markdown file – here that is if you’d like to follow along, or you can download the rendered R Notebook (nb.html) file, which itself includes the R Markdown file (Awesome! In the upper right of the html file, click “Code” -> “Download Rmd”).

An Ode to the Benefits of Messy Environmental Policy

By Mark Lubell - Posted on 08 September 2016

Ramiro Berardo and I recently published a new article on the structure of polycentric and complex governance systems for water management (sorry for the gated links…but see key figure inserted in this blog, where policy actors are circles, venues squares, and links represent participation).  We have been working on this project for a number of years, driven by the reality that most environmental governance arrangements involve many different actors participating in multiple policy venues, and working on interrelated problems.  Fortunately, veteran California environmental policy-maker Phil Isenberg was kind enough to provide a commentary on the article.  Among Phil’s comments are, “For those of us with some responsibility for making decisions on water and the environment and hoping to 'do good'

useR! talk on teaching R

By Michael Levy - Posted on 05 July 2016

Here is a video recording of my talk from useR! 2016 on teaching R. It’s nominally about teaching a lot of students in an intensive format, but I think almost everything translates to traditional classes. If for whatever reason this video isn’t working out for you, here is the source.

This talk was just one in a great session. I’d highly recommend:

useR! talk on teaching R

By Michael Levy - Posted on 05 July 2016

Here is a video recording of my talk from useR! 2016 on teaching R. It’s nominally about teaching a lot of students in an intensive format, but I think almost everything translates to traditional classes. If for whatever reason this video isn’t working out for you, here is the source.

This talk was just one in a great session. I’d highly recommend:

A Shiny app to help interpret GW-Degree estimates in ERGMs

By Michael Levy - Posted on 26 June 2016

Most researchers are misinterpreting geometrically weighted degree (GWD) estimates in exponential random graph models (ERGMs) of networks. By a 3:1 ratio papers cite positive estimates of GWD as indicative of a popularity or centralization force; in fact, positive estimates indicate dispersion of edges.

Shiny app

Here is a Shiny app that allows you to examine the effects of GWD parameter and decay-parameter values on network degree distributions. On the app’s other tabs, it provides some intuition on how the GWD statistic works and how GWD and GWESP – which is used to model triadic closure – are confounded.

Poster

I presented this research at the 2016 Political Networks conference. Check out the poster, which includes a literature review showing how prevalent this mistake is, by clicking on the image.

A Shiny app to help interpret GW-Degree estimates in ERGMs

By Michael Levy - Posted on 26 June 2016

Most researchers are misinterpreting geometrically weighted degree (GWD) estimates in exponential random graph models (ERGMs) of networks. By a 3:1 ratio papers cite positive estimates of GWD as indicative of a popularity or centralization force; in fact, positive estimates indicate dispersion of edges.

Shiny app

Here is a Shiny app that allows you to examine the effects of GWD parameter and decay-parameter values on network degree distributions. On the app’s other tabs, it provides some intuition on how the GWD statistic works and how GWD and GWESP – which is used to model triadic closure – are confounded.

Poster

I presented this research at the 2016 Political Networks conference. Check out the poster, which includes a literature review showing how prevalent this mistake is, by clicking on the image.

The 2016 Emergency Conservation Regulations: The Moral Hazard of Mandatory Measures

By Mark Lubell - Posted on 12 May 2016

On May 9, 2016 the State Water Resources Control Board (SWRCB) announced new emergency water conservation regulations applicable to urban water suppliers throughout the state.

ERGM Tutorial

By Michael Levy - Posted on 10 May 2016

This was originally for a talk to the UC Davis Network Science group on using statnet to manage, visualize, and model networks with a focus on exponential random graph models (ERGM). I have cleaned it up a little so that it hopefully stands on its own. If anything is unclear, feel free to leave questions in the comments.

Playing with Twitter Data

By Michael Levy - Posted on 28 April 2016

Last Friday, the Institute for Social Sciences hosted a great one-day conference on various aspects of the reproducability crisis, Making Social Science Transparent. It was the first time I’ve done much tweeting during an event like this, and while it felt a little silly, it was also fun, it was nice to hear what was resonating with other people at the event, and I’m psyched to stay connected to other participants on Twitter.

It also gave me an excuse to learn to scrape and analyze Twitter data. And doing that pushed me to setup RMarkdown rendering on this Jekyll site. I’m pretty psyched about both.

Water Data Cannot Fix Broken Behavior

By Mark Lubell - Posted on 06 April 2016

In a recent New York Times editorial, Charles Fishman argues “Water is Broken. Data Can Fix It.”   He laments the dearth of water data in the United States, and suggests that increasing the collection and availability of water data will create a demand for additional information, change behavior, and ignite innovation.  Mike Kiparsky and Joshua Viers reiterate this idea in the Los Angeles Times, in the context of needing better information for California water.   

Syndicate content