Data was obtained from the Texas Department of Insurance for a thirty year old single male driver across 78 cities. He owns his car and uses it primarily for work purposes, averaging about 12,000 miles annually. Insurance policies include Texas’s minimum auto insurance liability requirements: $30,000 for bodily injury liability per person (up to $60,000 per accident), and $25,000 of property damage (30/60/25 coverage) liability insurance, 50/100/50, as well as 100/300/100. Car insurance costs are based on a 2011 Toyota Camry four-door sedan, with 2.5 liter/4 cylinder engine.
Retrospectively rated insurance is a method of establishing a premium on large commercial accounts. The final premium is based on the insured's actual loss experience during the policy term, sometimes subject to a minimum and maximum premium, with the final premium determined by a formula. Under this plan, the current year's premium is based partially (or wholly) on the current year's losses, although the premium adjustments may take months or years beyond the current year's expiration date. The rating formula is guaranteed in the insurance contract. Formula: retrospective premium = converted loss + basic premium × tax multiplier. Numerous variations of this formula have been developed and are in use.
Advanced economies account for the bulk of global insurance. With premium income of $1.62 trillion, Europe was the most important region in 2010, followed by North America $1.41 trillion and Asia $1.16 trillion. Europe has however seen a decline in premium income during the year in contrast to the growth seen in North America and Asia. The top four countries generated more than a half of premiums. The United States and Japan alone accounted for 40% of world insurance, much higher than their 7% share of the global population. Emerging economies accounted for over 85% of the world's population but only around 15% of premiums. Their markets are however growing at a quicker pace.[44] The country expected to have the biggest impact on the insurance share distribution across the world is China. According to Sam Radwan of ENHANCE International LLC, low premium penetration (insurance premium as a % of GDP), an ageing population and the largest car market in terms of new sales, premium growth has averaged 15–20% in the past five years, and China is expected to be the largest insurance market in the next decade or two.[45]

Let's use the aftermath of Superstorm Sandy as an example to illustrate the differences between collision and comprehensive. Within that storm, let's consider two events that might have happened: 1) a heavy tree branch fell on your car, or 2) you swerved to avoid a falling tree branch and wound up crashing into a tree. In the first event, you had no control over when or why a tree branch would fall on your car. This kind of accident would get reimbursed under your comprehensive policy. In the second situation, you were driving the car and ultimately swerved into the tree, which makes it a collision, and collision insurance therefore pays for the damages. Events like the hypothetical ones stated above are why it's important to differentiate between the two types of coverage.
Collision coverage is very important for protecting your vehicle against the financial loss that comes with physical damage to your vehicle. It's not hard to get into an accident. When an accident happens, someone is always at fault, and that could be you. Collision insurance will cover damage from a collision with another vehicle, tree, pole, guardrail and most other possible roadway hazards.
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