With chronic shortages of basic goods afflicting her native Venezuela, Veronica Perez used to drive from supermarket to supermarket in her gray Chevrolet Aveo searching for food.  But the 54-year-old engineer has abandoned the practice because of shortages of something that should be abundant in a country with the world’s largest oil reserves: gasoline. “I only do what is absolutely necessary, nothing else,” said Perez, who lives in the industrial city of Valencia. She said she had stopped going to Venezuela’s Caribbean coast, just 20 miles (32 km) away. Snaking, hours-long lines and gas station closures have long afflicted Venezuela’s border regions. Fuel smuggling to neighboring countries is common, the result of generous subsidies from state-run oil company PDVSA […]