expected_header_sets <- 
  list(

    cleaned_20160403 =
      c(
        "date"
      , "gross_revenue_usd"
      , "estimated_monetized_playbacks"
      , "playback_based_cpm_usd"
      , "impression_based_cpm_usd"
      , "views"
      , "unique_cookies_web_only"
      , "watch_time_minutes"
      , "watch_time_hours"
      , "average_view_duration_minutes"
      , "average_percentage_viewed"
      , "subscriber_views"
      , "subscriber_minutes_watched"
      , "card_clicks"
      , "card_impressions"
      , "card_click_rate"
      , "card_teaser_clicks"
      , "card_teaser_impressions"
      , "card_teaser_click_rate"
      , "total_estimated_earnings_usd"
      , "ad_earnings_usd"
      , "adsense_earnings_usd"
      , "doubleclick_earnings_usd"
      , "transaction_earnings_usd"
      , "transactions"
      , "earnings_per_transaction_usd"
      , "verified_ad_impressions"
      , "clicks"
      , "clickable_impressions"
      , "click_through_rate"
      , "closes"
      , "closable_impressions"
      , "close_rate"
      , "annotations_impressions"
      , "videos_added"
      , "likes"
      , "likes_added"
      , "likes_removed"
      , "dislikes"
      , "dislikes_added"
      , "dislikes_removed"
      , "shares"
      , "comments"
      , "videos_in_playlists"
      , "videos_added_to_playlists"
      , "videos_removed_from_playlists"
      , "favorites"
      , "favorites_added"
      , "favorites_removed"
      , "youtube_red_earnings_usd"
      )
    ,
    cleaned_20160410 =
      c(
        "date"
      , "gross_revenue_usd"
      , "estimated_monetized_playbacks"
      , "playback_based_cpm_usd"
      , "impression_based_cpm_usd"
      , "views"
      , "unique_cookies_web_only"
      , "watch_time_minutes"
      , "watch_time_hours"
      , "average_view_duration"
      , "average_percentage_viewed"
      , "subscriber_views"
      , "subscriber_minutes_watched"
      , "card_clicks"
      , "card_impressions"
      , "card_click_rate"
      , "card_teaser_clicks"
      , "card_teaser_impressions"
      , "card_teaser_click_rate"
      , "total_estimated_earnings_usd"
      , "ad_earnings_usd"
      , "adsense_earnings_usd"
      , "doubleclick_earnings_usd"
      , "transaction_earnings_usd"
      , "transactions"
      , "earnings_per_transaction_usd"
      , "verified_ad_impressions"
      , "clicks"
      , "clickable_impressions"
      , "annotation_click_through_rate"
      , "closes"
      , "closable_impressions"
      , "annotation_close_rate"
      , "annotations_impressions"
      , "videos_added"
      , "likes"
      , "likes_added"
      , "likes_removed"
      , "dislikes"
      , "dislikes_added"
      , "dislikes_removed"
      , "shares"
      , "comments"
      , "videos_in_playlists"
      , "videos_added_to_playlists"
      , "videos_removed_from_playlists"
      , "favorites"
      , "favorites_added"
      , "favorites_removed"
      , "youtube_red_earnings_usd"
      )
    ,
    cleaned_20160424 =
      c(
        "date"
      , "gross_revenue_usd"
      , "estimated_monetized_playbacks"
      , "playback_based_cpm_usd"
      , "impression_based_cpm_usd"
      , "views"
      , "unique_cookies_web_only"
      , "watch_time_minutes"
      , "watch_time_hours"
      , "average_view_duration"
      , "average_percentage_viewed"
      , "subscriber_views"
      , "subscriber_minutes_watched"
      , "card_clicks"
      , "card_impressions"
      , "card_click_rate"
      , "card_teaser_clicks"
      , "card_teaser_impressions"
      , "card_teaser_click_rate"
      , "total_estimated_earnings_usd"
      , "ad_earnings_usd"
      , "adsense_earnings_usd"
      , "doubleclick_earnings_usd"
      , "transaction_earnings_usd"
      , "transactions"
      , "earnings_per_transaction_usd"
      , "ad_impressions_usd"
      , "clicks"
      , "clickable_impressions"
      , "annotation_click_through_rate"
      , "closes"
      , "closable_impressions"
      , "annotation_close_rate"
      , "annotations_impressions"
      , "videos_added"
      , "likes"
      , "likes_added"
      , "likes_removed"
      , "dislikes"
      , "dislikes_added"
      , "dislikes_removed"
      , "shares"
      , "comments"
      , "videos_in_playlists"
      , "videos_added_to_playlists"
      , "videos_removed_from_playlists"
      , "favorites"
      , "favorites_added"
      , "favorites_removed"
      , "youtube_red_earnings_usd"
      )
    ,

  cleaned_but_no_dict_changes = 
    c(
          "date"
        , "youtube_ad_revenue_usd"
        , "estimated_monetized_playbacks"
        , "playback_based_cpm_usd"
        , "cpm_usd"
        , "views"
        , "unique_cookies_web_only"
        , "watch_time_minutes"
        , "watch_time_hours"
        , "average_view_duration"
        , "average_percentage_viewed"
        , "subscriber_views"
        , "subscriber_minutes_watched"
        , "card_clicks"
        , "cards_shown"
        , "clicks_per_card_shown"
        , "card_teaser_clicks"
        , "card_teasers_shown"
        , "clicks_per_card_teaser_shown"
        , "estimated_partner_revenue_usd"
        , "estimated_partner_ad_revenue_usd"
        , "estimated_partner_adsense_revenue_usd"
        , "estimated_partner_doubleclick_revenue_usd"
        , "partner_transaction_revenue_usd"
        , "transactions"
        , "partner_revenue_per_transaction_usd"
        , "ad_impressions_usd"
        , "youtube_red_watch_time_minutes"
        , "youtube_red_views"
        , "youtube_red_partner_revenue_usd"
        , "youtube_red_watch_time_hours"
        , "annotation_clicks"
        , "clickable_annotations_shown"
        , "annotation_click_through_rate"
        , "annotation_closes"
        , "closable_annotations_shown"
        , "annotation_close_rate"
        , "annotations_shown"
        , "videos_added"
        , "likes"
        , "likes_added"
        , "likes_removed"
        , "dislikes"
        , "dislikes_added"
        , "dislikes_removed"
        , "shares"
        , "comments"
        , "videos_in_playlists"
        , "videos_added_to_playlists"
        , "videos_removed_from_playlists"
    )
    , 
  uncleaned_older = 
    c(
          "Date"
        , "Gross revenue (USD)"
        , "Estimated monetized playbacks"
        , "Playback-based CPM (USD)"
        , "Impression-based CPM (USD)"
        , "Views"
        , "Unique cookies (web only)"
        , "Watch time (minutes)"
        , "Watch time (hours)"
        , "Average view duration (minutes)"
        , "Average percentage viewed"
        , "Subscriber views"
        , "Subscriber minutes watched"
        , "Card clicks"
        , "Card impressions"
        , "Card click rate"
        , "Card teaser clicks"
        , "Card teaser impressions"
        , "Card teaser click rate"
        , "Total estimated earnings (USD)"
        , "YouTube Red earnings (USD)"
        , "Ad earnings (USD)"
        , "AdSense earnings (USD)"
        , "DoubleClick earnings (USD)"
        , "Transaction earnings (USD)"
        , "Transactions"
        , "Earnings per transaction (USD)"
        , "Impressions"
        , "Clicks"
        , "Clickable impressions"
        , "Click through rate"
        , "Closes"
        , "Closable impressions"
        , "Close rate"
        , "Impressions"
        , "Likes"
        , "Likes added"
        , "Likes removed"
        , "Dislikes"
        , "Dislikes added"
        , "Dislikes removed"
        , "Shares"
        , "Comments"
        , "Favorites"
        , "Favorites added"
        , "Favorites removed"
        , "Videos in playlists"
        , "Videos added to playlists"
        , "Videos removed from playlists"
    )
)