Bureau of Transportation Statistics (BTS)
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Table 1: Borderplex Model Variables

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Series Description
Endogenous variables
AIRP U.S. Air Travel Price Index1 (1982-1984 = 100)
ELAFDT El Paso International Airport Inbound Freight Shipments (1,000 tons)
ELAFET El Paso International Airport Outbound Freight Shipments (1,000 tons)
ELAMD El Paso International Airport Inbound U.S. Mail (1,000 tons)
ELAME El Paso International Airport Outbound U.S. Mail (1,000 tons)
ELBAC Bridge of the Americas Northbound Light Vehicle Traffic (millions)
ELBAT Bridge of the Americas Northbound Cargo Vehicle Traffic (millions)
ELBAW Bridge of the Americas Northbound Pedestrian Traffic (millions)
ELBPC Paso del Norte Northbound Light Vehicle Bridge Traffic (millions)
ELBPW Paso del Norte Northbound Pedestrian Bridge Traffic (millions)
ELBTC Total Northbound Light Vehicles (millions)
ELBTT Total Northbound Cargo Vehicles (millions)
ELBTW Total Northbound Pedestrians (millions)
ELBYC Ysleta-Zaragoza Northbound Light Vehicle Bridge Traffic (millions)
ELBYT Ysleta-Zaragoza Northbound Cargo Vehicle Bridge Traffic (millions)
ELBYW Ysleta-Zaragoza Northbound Pedestrian Bridge Traffic (millions)
ELAPDD El Paso International Airport Domestic Passenger Arrivals (thousands)
ELAPDI El Paso International Airport International Passenger Arrivals (thousands)
ELAPDT El Paso International Airport Total Passenger Arrivals (thousands)
ELAPED El Paso International Airport Domestic Passenger Departures (thousands)
ELAPEI El Paso International Airport International Passenger Departures (thousands)
ELAPET El Paso International Airport Total Passenger Departures (thousands)
MAILP U.S. Air Mail Price Index (1996 = 100)
Exogenous variables
CESTRNPI U.S. Consumption Expenditures, Intercity Travel (billion $)
CJMQM Ciudad Juárez Maquiladora Employment (thousands)
CJPOP Ciudad Juárez July 1 Population (thousands)
DV911 International Bridge Security Dummy Var. = 1 for 2001, 2002, ...
ELBDC Dedicated Commuter Lane Northbound Light Vehicles (millions)
ELGMP96 El Paso Gross Metropolitan Product (billion 1996 $)
ELPPOP El Paso July 1 Population (thousands)
ELYWSD El Paso Wage and Salary Disbursements (million $)
ELYLP El Paso Labor and Proprietor Earnings (million $)
GDP96 U.S. Gross Domestic Product (GDP) (billion 1996 $)
MXREX Mexico, Real Exchange Rate Index, Peso/$ (1997 = 100)
PDCCESTRNPI U.S. Intercity Chained Travel Deflator (1996 = 100)
PDCGDP U.S. GDP Chained Price Deflator (1996 = 100)
Equation statistics
SUM SQ Error Sum of Squares
STD ERR Standard Error of Regression
LHS MEAN Left Hand Side Dependent Variable Sample Mean
R SQ R-Squared Coefficient of Determination
R BAR SQ Adjusted R-Squared Coefficient of Determination
F F Statistic for Joint Slope Coefficient Equality to Zero Hypothesis
DW Durbin Watson Serial Correlation Statistic for logs 1 (DW(1)) and 2 (DW(2))
H Durbin H Lagged Dependent Variable Serial Correlation Statistic

1 This index is the Consumer Price Index Component for Personal Travel. U.S. Department of Commerce, U.S. Census Bureau, Statistical Abstract of the United States (Washington, DC: Various issues).