Traditionally, many style guides define components as atomic components, which are then used to build more complex molecules. In theory, this works well to create coherent and flexible systems. In practice, however, what often happens is that these re-usable atoms are used many different ways, allowing all kinds of molecules to be created. Again, this opens the door for all kinds of disjointed experiences and makes the system harder to maintain.
In November 2012, Airbnb acquired NabeWise, a city guide that aggregates curated information for specified locations. The acquisition shifted the company focus toward offering hyperlocal recommendations to travelers. That same month, Airbnb launched "Neighborhoods", a travel guide of 23 cities that provides in-depth information via collaborative filtering to help travelers choose a neighborhood in which to stay based on criteria such as public transportation, dining, peace & quiet, nightlife, tourist attractions, and shopping.
A study published in 2017 found that increasing Airbnb listings in a given neighborhood by 10% leads to a 0.42% increase in rents and a 0.76% increase in house prices. According to an analysis conducted in 2016, while commercial listings comprised only 10% of Airbnb's total listings in 25 largest U. S. markets for the period between June 2015 and May 2016, they constituted about a third of host revenue. In markets such as Los Angeles and Portland, Oregon, the share of revenue from commercial listings reached nearly 50%.
American is one of the nation's leading airlines in flights to international destinations. AA Airlines flies to several countries in South America, including Brazil, Colombia, Argentina, and Peru. Through their hub in Dallas, American dominates the travel market to Central America, with service to almost every country between Mexico and Colombia. European service is anchored by American's oneworld partners, with American Airlines flights to the United Kingdom, Germany, Spain and other countries supplemented with seasonal service to countries like Norway and Sweden. American also serves Asia with flights to Shanghai and Beijing in China; Nagoya, Osaka, and Tokyo in Japan, and several additional nations.
In May 2017, American announced they would be adding more seats to some of its Boeing 737 MAX jetliners and reducing overall legroom in the basic economy class. The last three rows will lose two inches; going from the current 31 to 29 inches. The remainder of the economy cabin will have 30 inches of legroom. This compares to JetBlue with 34 inches of legroom and Spirit with 28 inches.
Due to the growth of international end-users, in early 2012, Airbnb opened offices in Paris, Milan, Barcelona, Copenhagen, Moscow, and São Paulo. These openings were in addition to existing offices in San Francisco, London, Hamburg, and Berlin. In September 2013, the company announced that it would establish its European headquarters in Dublin. Prior to the 2012 Summer Olympics, Airbnb acquired London-based rival CrashPadder, subsequently adding 6,000 international listings to its existing inventory. This acquisition made Airbnb the largest lodging website in the United Kingdom.