Secure & Prepared, August 22, 2006, Vol.2, no.16

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, September 5, 2006, Vol.2, no.17

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, September 19, 2006, Vol.2, no.18

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, October 4, 2006, Vol.2, no.19

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, October 31, 2006, Vol.2, no.21

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, October 17, 2006, Vol.2, no.20

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, November 28, 2006, Vol.2, no.22

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, December 12, 2006, Vol.2, no.23

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, January 10, 2007, Vol.3, no.1

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure & Prepared, January 23, 2007, Vol.3, no.2

Secure & Prepared is a bi-weekly publication of the Iowa Homeland Security & Emergency Management Division for those involved in the homeland security system in the state of Iowa.

Secure and Prepared Newsletter, August 7, 2007

Bi-monthly newsletter for those involved in the fields of homeland security and/or emergency management.

Secure and Prepared Newsletter, July 24, 2007, Vol. 3, no. 12

A bi-weekly newsletter for those involved in the fields of homeland security and/or emergency management

Computation of multiple correspondence analysis, with code in R

The generalization of simple correspondence analysis, for two categorical variables, to multiple correspondence analysis where they may be three or more variables, is not straighforward, both from a mathematical and computational point of view. In this paper we detail the exact computational steps involved in performing a multiple correspondence analysis, including the special aspects of adjusting the principal inertias to correct the percentages of inertia, supplementary points and subset analysis. Furthermore, we give the algorithm for joint correspondence analysis where the cross-tabulations of all unique pairs of variables are analysed jointly. The code in the R language for every step of the computations is given, as well as the results of each computation.

Negativity effect in multiparty electoral competition

We construct a dynamic voting model of multiparty competition in order to capture the following facts: voters base their decision on past economicperformance of the parties, and parties and candidates have different objectives. This model may explain the emergence of parties' ideologies,and shows the compatibility of the different objectives of parties and candidates. Together, these results give rise to the formation ofpolitical parties, as infinetely-lived agents with a certain ideology, out of the competition of myopic candidates freely choosing policy positions. We also show that in multicandidate elections held under the plurality system, Hotelling's principle of minimum differentiation is no longer satisfied.