Prince William and Kate Middleton’s royal bundle of joy hasn’t even arrived yet, but market researchers say they already know how much the little tike is worth.

According to the U.K.’s Centre for Retail Research (CRR), the royal baby’s arrival will bring the equivalent of a $376-million U.S. boost to Britain’s economy, in the form of spending on souvenirs, books and DVDs and, of course, partying.

The centre estimates that Britons will spend an extra $93 million on alcohol sales alone, thanks to the royal birth.

One of the most closely watched elements of the birth will be the “unintentional Royal brand endorsement” of a brand of pram for the newborn, said professor Joshua Bamfield, head of the CRR.

“The carriage of choice for the royal arrival will no doubt become this year’s best selling pram for new and existing parents,” he said. “The ‘Kate effect’ has already taken the fashion world by storm with each of her choices flying off the shelves within moments of her leaving the house.”

All of this is officially approved by the royals, at least to an extent. Prince William and Kate gave their official seal of approval to baby-birth memorabilia last week.

The baby’s official due date is Saturday, July 13, but the royal family are keeping the baby’s gender under wraps — making it somewhat difficult to market memorabilia.

Some sellers have opted to go with generic royal family themes, such as the makers of this iPhone cover featuring a Union Jack and a baby wearing a crown.

There is also a royal baby pillow, and a baby romper with the words “Keep Calm - My Granny Is The Queen.”

CRR’s Bamfield says the royal baby amounts to a gift to British retailers at a time of sluggish economic growth.

“These are difficult times for retailers and every catalyst for consumer spending should be utilized as this will bring the economic recovery one step closer,” he said.

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  • Britain's Prince William and his fiancee Kate Middleton are seen at St. James's Palace in London, after they announced their engagement.

  • Prince William and his bride Kate walk down the aisle at Westminster Abbey, following their marriage, in London.

  • Prince William and his wife Kate Middleton, who has been given the title of The Duchess of Cambridge, kiss on the balcony of Buckingham Palace, London, following their wedding at Westminster Abbey.

  • Britain's Prince William (R) and Catherine, Duchess of Cambridge, leave after they attended the wedding between England rugby player Mike Tindall and Britain's Zara Phillips, granddaughter of Queen Elizabeth II, at Canongate Kirk in Edinburgh, Scotland, on July 30, 2011.

  • Peter Phillips, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge look on during the Show Jumping Eventing Equestrian on Day 4 of the London 2012 Olympic Games at Greenwich Park on July 31, 2012 in London, England.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge look on during the Show Jumping Eventing Equestrian on Day 4 of the London 2012 Olympic Games at Greenwich Park on July 31, 2012 in London, England.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge look on during the Show Jumping Eventing Equestrian on Day 4 of the London 2012 Olympic Games at Greenwich Park on July 31, 2012 in London, England.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge visit the Team GB accommodation flats in the Athletes Village at the Olympic Park in Stratford on Day 4 of the London 2012 Olympic Games on July 31, 2012 in London, England.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Show Jumping Eventing Equestrian on Day 4 of the London 2012 Olympic Games at Greenwich Park on July 31, 2012 in London, England.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge during the match between Andy Murray of Great Britain and Nicolas Almagro of Spain in the Quarterfinal of Men's Singles Tennis on Day 6 of the London 2012 Olympic Games at Wimbledon on August 2, 2012 in London, England.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge during the match between Andy Murray of Great Britain and Nicolas Almagro of Spain in the Quarterfinal of Men's Singles Tennis on Day 6 of the London 2012 Olympic Games at Wimbledon on August 2, 2012 in London, England.

  • Great Britain's Prince Williams (C), his wife Kate Middleton and Prince Harry attend the Men's team sprint track cycling event of London 2012 Olympic games, on August 2, 2012 in London.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge during Day 6 of the London 2012 Olympic Games at Velodrome on August 2, 2012 in London, England.

  • Britain's Prince William (R), the Duke of Cambridge and Catherine and Duchess of Cambridge (L) attend the athletics events held at the Olympic Stadium during the London 2012 Olympic Games on August 4, 2012 in London.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge look on during the Opening Ceremony of the London 2012 Paralympics at the Olympic Stadium on August 29, 2012 in London, England.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge look on during the Opening Ceremony of the London 2012 Paralympics at the Olympic Stadium on August 29, 2012 in London, England.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge share a joke as they clap whilst watching the track cycling on day 1 of the London 2012 Paralympic Games at the Velodrome on August 30, 2012 in London, England.

  • Britain's Prince William (L) and Catherine, Duchess of Cambridge, watch the cycling action at the Velodrome on the opening day of the London 2012 Paralympic Games at the Olympic Park in east London, on August 30, 2012.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge smile as they look at an orchid named in honour of Diana, Princess of Wales at Singapore Botanical Gardens on day 1 of their Diamond Jubilee tour on September 11, 2012 in Singapore.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose at The Istana on day 1 of their Diamond Jubilee tour on September 11, 2012 in Singapore.

  • Britain's Prince William (R) and his wife Catherine, the Duchess of Cambridge, are welcomed by a lion dance performance during their visit to Strathmore Green, a precinct in Queenstown, a residential district of Singapore on September 12, 2012.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch a dancing dragon as they attend a cultural event in Queenstown on day 2 of their Diamond Jubilee Tour on September 12, 2012 in Singapore.

  • Britain's Prince William (C) and his wife Catherine (L), the Duchess of Cambridge, smile during their visit to Strathmore Green, a precinct in Queenstown, a residential district of Singapore on September 12, 2012.

  • Prince William, Duke of Cambridge (L) and Catherine, Duchess of Cambridge (R) pose with four-year-old Maeve Low as they tour the Rolls-Royce Seletar Campus during the Diamond Jubilee tour at Seletar Aerospace Park on September 12, 2012 in Singapore.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (R) wear goggles as they tour the Rolls-Royce Seletar Campus during the Diamond Jubilee tour at Seletar Aerospace Park on September 12, 2012 in Singapore.

  • Britain's Prince William and his wife Catherine, the Duchess of Cambridge, make a toast in the honour of Queen Elisabeth Diamond Jubilee at a British Gala reception at the Eden Hall in Singapore on September 12, 2012.

  • Britain's Prince William (R) with his wife Catherine, the Duchess of Cambridge, walk past gravestones as they visit the Kranji Memorial Cemetery in Singapore on September 13, 2012.

  • Prince William, Duke of Cambridge (L) and Catherine, Duchess of Cambridge attend an official dinner hosted by Malaysia's Head of State Sultan Abdul Halim Mu'adzam Shah of Kedah on Day 3 of their Diamond Jubilee Tour on September 13, 2012 in Kuala Lumpur, Malaysia.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit Assyakirin Mosque on day 4 of their Diamond Jubilee Tour on September 14, 2012 in Kuala Lumpur, Malaysia.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit Assyakirin Mosque on day 4 of their Diamond Jubilee Tour on September 14, 2012 in Kuala Lumpur, Malaysia.

  • Britain's Prince William (R) and Catherine, the Duchess of Cambridge (L) arrive at the Borneo Rainforest Research Center in Danum Valley, some 70 kilometers west of Lahad Datu, on the island of Borneo on September 15, 2012.

  • Britain's Prince William (L) and Catherine, the Duchess of Cambridge (R), speak to each other during their visit at the Borneo Rainforest Lodge in Danum Valley, some 70 kilometers (44 miles) west of Lahad Datu, on the island of Borneo on September 15, 2012.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose wearing traditional island clothing during a visit to the Governor General's house as part of their Diamond Jubilee tour on September 16, 2012 in Honiara, Guadalcanal Island.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile as they arrive at Honiara Cathederal during their Diamond Jubilee tour on September 16, 2012 in Honiara, Guadalcanal Island.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile as they arrive at Honiara Cathederal during their Diamond Jubilee tour on September 16, 2012 in Honiara, Guadalcanal Island.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge visit Tuvanipupu Island on their Diamond Jubilee tour on September 17, 2012 in Honiara, Guadalcanal Island.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit Tuvanipupu Island on their Diamond Jubilee tour of the Far East on September 17, 2012 in Honiara, Guadalcanal Island.

  • Britain's Prince William (L) and his wife Catherine, the Duchess of Cambridge, take part in a welcoming 'fatele' upon their arrival in Funafuti in Tuvalu on September 18, 2012. Nearly half the population of 10,500 turned out to greet the future king and his wife.

  • Britain's Prince William (L) and his wife Catherine (R), the Duchess of Cambridge, wearing traditional headwear, watch a welcoming 'fatele' upon their arrival in Funafuti in Tuvalu on September 18, 2012.

  • Britain's Prince William (L) and his wife Catherine (R), the Duchess of Cambridge, dance during a 'fatale', a singing and dancing event, in Funafuti on Tuvalu on September 18, 2012.

  • Britain's Prince William (L) tries his hand at breaking open a coconut after it has been husked in Nanumaga Village as his wife Catherine (R), the Duchess of Cambridge, looks on during their visit to Funafuti on Tuvalu on September 18, 2012.

  • Britain's Prince William (L) and his wife Catherine (R), the Duchess of Cambridge, attend a dinner event in Funafuti on Tuvalu on September 18, 2012.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit Middle Temple on October 8, 2012 in London, England. The Duke of Cambridge, Master of the Bench, and The Duchess of Cambridge met recipients of the Queen Mother Scholarship, the Diana, Princess of Wales Scholarship and the Duke and Duchess of Cambridge Scholarships at Middle Temple Inn, London. (Photo by Chris Jackson - WPA Pool/Getty Images)

  • Prince William The Duke of Cambridge (C) and his wife Catherine the Duchess of Cambridge speak with England football Manager Roy Hodgson (L) and assistant Coach Ray Lewington (R) during the opening of Football Associations National Fooball Centre, St Georges Park in Burton Upon Trent on October 9, 2012.

  • Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge play a reaction game in the new gym during the official launch of The Football Association's National Football Centre at St George's Park on October 9, 2012 in Burton-upon-Trent, England.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit 'Jimmy's', a night shelter, on November 28, 2012 in Cambridge, England.

  • The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch the races on day 4 of the Cheltenham Festival at Cheltenham Racecourse on March 15, 2013 in Cheltenham, England.

  • Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch the races on Gold Cup Day at Cheltenham Racecourse on the fourth and final day of the Cheltenham Festival 2013 on March 15, 2013 in Cheltenham, England.

  • Britain's Catherine, Duchess of Cambridge, and her husband, Prince William, attend St. Patrick's Day Parade at Mons Barracks in Aldershot, southern England, on March 17, 2013.

  • Prince William and Catherine Middleton visit the Emirates Arena on April 4, 2013 in Glasgow, Scotland.